Weather and climate in Thailand by month: 15 destinations

When can you go to Thailand?

For most destinations in this overview, November to February is the driest and most pleasant season. The rainy season runs roughly from May to October, with most rain in the second half of that period.

There are exceptions. On Koh Samui most rain falls in October and November (November is the wettest month there); at Khanom, October and November are the wettest. On the Andaman coast (Phuket, Krabi, Khao Lak) the sea is rougher from May to October; see the Sea column in the tables.

In the north (Chiang Mai, Chiang Rai) December and January are the coolest months, with night-time lows of 13–15°C, and March and April are the hottest. During that period smoke haze can hang over the region because of crop burning.

Best time to go per destination

Pick a destination for all months, or compare all destinations side by side below.

Rayong Hua Hin Khao Lak Khanom Koh Chang Koh Samui Bangkok Chiang Mai Phuket Pattaya Ayutthaya Chiang Rai Krabi Kanchanaburi Buri Ram

Destination	Location	Best time	Dry	Wet	Hottest month	Wettest month
Rayong	Gulf of Thailand, east coast	Nov–Apr	Nov–Apr	May–Oct	Apr (34°C)	Sep (300 mm)
Hua Hin	Gulf of Thailand, central	Nov–Mar	Nov–Mar	May–Oct	Apr (34°C)	Oct (246 mm)
Khao Lak	Andaman coast, west coast	Nov–Apr	Nov–Apr	May–Oct	Mar (34°C)	Sep (465 mm)
Khanom	Gulf of Thailand, south	Feb–Apr	Feb–Apr	Oct–Jan	Apr (32°C)	Oct (300 mm)
Koh Chang	Gulf of Thailand, east	Nov–Mar	Nov–Mar	May–Oct	Feb (33°C)	Jun (550 mm)
Koh Samui	Gulf of Thailand, south	Dec–Mar	Jan–Sep	Oct–Dec	Apr (33°C)	Nov (507 mm)
Bangkok	Central, capital	Nov–Feb	Nov–Feb	May–Oct	Apr (35°C)	Sep (220 mm)
Chiang Mai	North, mountains	Nov–Feb	Nov–Feb	May–Oct	Apr (36°C)	Aug (217 mm)
Phuket	Andaman coast, island	Dec–Mar	Dec–Apr	May–Nov	Feb (34°C)	Sep (350 mm)
Pattaya	Gulf of Thailand, east	Nov–Feb	Nov–Apr	May–Oct	Apr (33°C)	Sep (210 mm)
Ayutthaya	Central, near Bangkok	Nov–Feb	Nov–Feb	May–Oct	Apr (37°C)	Sep (330 mm)
Chiang Rai	North, Golden Triangle	Nov–Feb	Nov–Feb	May–Oct	Apr (35°C)	Aug (321 mm)
Krabi	Andaman coast, south	Dec–Mar	Dec–Apr	May–Nov	Feb (34°C)	Oct (298 mm)
Kanchanaburi	West, River Kwai	Nov–Feb	Nov–Feb	May–Oct	Apr (38°C)	Sep (190 mm)
Buri Ram	Northeast, Isaan	Nov–Feb	Nov–Feb	May–Oct	Apr (37°C)	Sep (302 mm)

Compare all destinations by month

Each cell shows the weather score and the rainfall in mm. Click a destination for all details.

++ Excellent (dry, sunny)
+ Good (little rain)
± Fair (mixed)
− Poor (wet or rough)

Compare all destinations by month (rainfall, mm)
Destination	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Rayong	Excellent, 25	Excellent, 25	Good, 65	Good, 80	Fair, 185	Poor, 240	Poor, 240	Poor, 220	Poor, 300	Poor, 230	Good, 55	Excellent, 15
Hua Hin	Excellent, 12	Excellent, 15	Good, 54	Excellent, 46	Good, 109	Good, 79	Good, 93	Good, 71	Good, 120	Poor, 246	Good, 101	Excellent, 8
Khao Lak	Excellent, 42	Excellent, 30	Good, 70	Fair, 155	Poor, 345	Poor, 340	Poor, 365	Poor, 400	Poor, 465	Poor, 370	Poor, 210	Good, 65
Khanom	Good, 75	Excellent, 34	Good, 86	Good, 106	Fair, 153	Good, 117	Fair, 122	Fair, 137	Poor, 183	Poor, 300	Poor, 281	Fair, 152
Koh Chang	Excellent, 20	Excellent, 50	Good, 90	Good, 120	Poor, 350	Poor, 550	Poor, 550	Poor, 550	Poor, 550	Poor, 300	Excellent, 50	Excellent, 30
Koh Samui	Good, 86	Good, 54	Good, 81	Good, 83	Fair, 156	Fair, 124	Good, 116	Good, 111	Fair, 122	Poor, 310	Poor, 507	Poor, 210
Bangkok	Excellent, 10	Excellent, 10	Excellent, 50	Good, 110	Fair, 180	Fair, 180	Fair, 180	Fair, 170	Poor, 220	Fair, 190	Excellent, 40	Excellent, 10
Chiang Mai	Excellent, 4	Excellent, 9	Excellent, 18	Good, 57	Fair, 162	Fair, 125	Poor, 140	Poor, 217	Poor, 211	Good, 118	Good, 54	Excellent, 16
Phuket	Excellent, 50	Excellent, 24	Good, 81	Fair, 135	Poor, 237	Poor, 249	Poor, 240	Poor, 309	Poor, 350	Poor, 336	Fair, 178	Good, 82
Pattaya	Excellent, 20	Excellent, 15	Excellent, 25	Excellent, 40	Fair, 150	Fair, 130	Fair, 180	Fair, 200	Poor, 210	Fair, 160	Good, 70	Excellent, 30
Ayutthaya	Excellent, 4	Excellent, 10	Excellent, 50	Good, 101	Poor, 211	Fair, 182	Poor, 228	Poor, 302	Poor, 330	Poor, 162	Excellent, 19	Excellent, 3
Chiang Rai	Excellent, 11	Excellent, 15	Excellent, 33	Good, 84	Fair, 198	Fair, 172	Poor, 287	Poor, 321	Poor, 272	Fair, 121	Excellent, 47	Excellent, 12
Krabi	Excellent, 32	Excellent, 19	Good, 57	Good, 105	Poor, 215	Poor, 214	Poor, 216	Poor, 230	Poor, 280	Poor, 298	Poor, 148	Good, 59
Kanchanaburi	Excellent, 2	Excellent, 10	Excellent, 30	Good, 75	Fair, 135	Good, 105	Good, 100	Good, 95	Fair, 190	Fair, 170	Excellent, 45	Excellent, 5
Buri Ram	Excellent, 8	Excellent, 10	Good, 56	Good, 81	Poor, 203	Fair, 198	Poor, 224	Poor, 254	Poor, 302	Good, 107	Excellent, 30	Excellent, 13

☀️ Rayong

Gulf of Thailand · East coast · Rayong province

Best time: Nov–Apr Dry: Nov–Apr Wet: May–Oct

Rainfall per month (mm); colour = weather score

Rayong: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	22–32°C	25 mm	3 days	74%	7.5 hrs	Calm	Cool and dry. Lowest humidity, clear skies. Ideal beach weather.
February	++ Excellent	22–32°C	25 mm	3 days	74%	7.5 hrs	Calm	Dry season continues. Warm sunny days, calm sea.
March	+ Good	26–33°C	65 mm	6 days	74%	8 hrs	Calm	Transition to the hot season. Sunniest month, the odd shower.
April	+ Good	27–34°C	80 mm	9 days	77%	7 hrs	Calm	Hottest month. Songkran festival. Afternoon thunderstorms possible.
May	± Fair	27–34°C	185 mm	17 days	78%	5.5 hrs	Moderate	Southwest monsoon begins. Rainfall rises sharply. Rayong Fruit Festival.
June	− Poor	27–33°C	240 mm	18 days	78%	4 hrs	Moderate	Rainy season established. Frequent afternoon showers, cloudy.
July	− Poor	27–32°C	240 mm	18 days	77%	4 hrs	Moderate	Rainy season continues. Steady rainfall.
August	− Poor	26–32°C	220 mm	18 days	79%	3.8 hrs	Moderate	Peak monsoon. Heavy rain, high humidity.
September	− Poor	26–32°C	300 mm	20 days	82%	3.7 hrs	Rough	Wettest month. Peak rainfall, rough sea, tropical storm risk.
October	− Poor	26–32°C	230 mm	18 days	82%	4.5 hrs	Rough	Late rainy season. Heavy rain eases but the sea is still rough.
November	+ Good	25–32°C	55 mm	8 days	76%	6 hrs	Moderate	Transition to the dry season. Rain drops quickly, sea calms down.
December	++ Excellent	22–32°C	15 mm	2 days	70%	7.5 hrs	Calm	Driest month. Lowest humidity, clear. Peak beach season.

🌤️ Hua Hin

Gulf of Thailand · Central · Prachuap Khiri Khan

Best time: Nov–Mar Dry: Nov–Mar Wet: May–Oct

Rainfall per month (mm); colour = weather score

Hua Hin: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	22–30°C	12 mm	2 days	71%	9 hrs	Calm	Cool dry season. Peak beach weather, minimal rain, comfortable.
February	++ Excellent	23–31°C	15 mm	2 days	69%	9 hrs	Calm	Sunny and warm, calm sea, very little rain.
March	+ Good	25–32°C	54 mm	2 days	70%	9 hrs	Calm	Hot and mostly dry. Heat builds, the odd short shower.
April	++ Excellent	26–34°C	46 mm	4 days	73%	8 hrs	Calm	Hottest month. Songkran water festival. Intense midday heat.
May	+ Good	26–34°C	109 mm	13 days	74%	7 hrs	Calm	Hot with increasing rain. Transition to the wet season.
June	+ Good	26–33°C	79 mm	15 days	75%	5 hrs	Moderate	Rainy season begins. Short heavy afternoon showers, mornings often sunny.
July	+ Good	26–33°C	93 mm	17 days	76%	5 hrs	Moderate	Monsoon. Frequent afternoon showers, warm temperatures.
August	+ Good	26–33°C	71 mm	18 days	73%	5 hrs	Moderate	Monsoon continues. Short heavy showers with sunny spells in between.
September	+ Good	25–32°C	120 mm	17 days	78%	4 hrs	Moderate	Peak rainy season. Heavy afternoon storms, least sun of the year.
October	− Poor	25–31°C	246 mm	17 days	80%	5 hrs	Rough	Wettest month. The northeast monsoon brings heavy rain and a rough sea.
November	+ Good	24–30°C	101 mm	9 days	74%	7 hrs	Moderate	Rain eases through the month. Transition to the dry season.
December	++ Excellent	23–30°C	8 mm	2 days	67%	9 hrs	Calm	Driest month. Cool dry season, lowest humidity. Ideal.

⛅ Khao Lak

Andaman coast · Phang Nga province · West coast

Best time: Nov–Apr Dry: Nov–Apr Wet: May–Oct

Rainfall per month (mm); colour = weather score

Khao Lak: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	22–32°C	42 mm	5 days	76%	9 hrs	Calm	Peak dry season. Pleasant northeast monsoon wind, ideal beach weather.
February	++ Excellent	22–33°C	30 mm	4 days	72%	10 hrs	Calm	Driest and sunniest month. Lowest humidity, top diving conditions.
March	+ Good	23–34°C	70 mm	6 days	74%	9 hrs	Calm	Hot and mostly dry. Temperatures rise, the odd short shower.
April	± Fair	24–34°C	155 mm	14 days	78%	8 hrs	Calm	Transition month. Hottest period, more thunderstorms. Similan Islands still open.
May	− Poor	24–32°C	345 mm	22 days	83%	6 hrs	Moderate	Southwest monsoon begins. Heavy rain, rough sea. Similan/Surin Islands close.
June	− Poor	24–31°C	340 mm	21 days	84%	5 hrs	Rough	Wet season. Frequent heavy rain, rough sea, red flags on the beaches.
July	− Poor	24–31°C	365 mm	20 days	84%	6 hrs	Rough	Peak wet season. Persistent heavy rain, rough sea. Swimming is dangerous.
August	− Poor	24–31°C	400 mm	22 days	84%	6 hrs	Rough	Very wet. Heavy monsoon rain, rough sea. Lush green nature.
September	− Poor	24–30°C	465 mm	23 days	86%	5 hrs	Rough	Wettest month of the year. Heaviest rainfall, very rough sea, flood risk.
October	− Poor	23–31°C	370 mm	22 days	87%	5 hrs	Moderate	Late monsoon. Rain eases towards the end of the month. Highest humidity.
November	− Poor	23–31°C	210 mm	15 days	84%	6 hrs	Moderate	Transition to the dry season. Rainfall drops. Similan Islands open mid-November.
December	+ Good	22–31°C	65 mm	7 days	78%	8 hrs	Calm	Dry season established. Pleasant temperatures, calm sea. Peak tourist season.

🏖️ Khanom

Gulf of Thailand · South · Nakhon Si Thammarat province

Best time: Feb–Apr Dry: Feb–Apr Wet: Oct–Jan

Rainfall per month (mm); colour = weather score

Khanom: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	+ Good	25–29°C	75 mm	9 days	82%	6 hrs	Calm	Pleasant with a cool northeast monsoon wind that is fading; still some rain.
February	++ Excellent	25–30°C	34 mm	4 days	80%	7.5 hrs	Calm	Driest month. Sunny skies and calm conditions.
March	+ Good	26–31°C	86 mm	8 days	79%	8 hrs	Calm	Hot and dry. Peak sunshine hours of the year.
April	+ Good	27–32°C	106 mm	11 days	79%	7 hrs	Calm	Hottest month. The odd pre-monsoon thunderstorm.
May	± Fair	27–32°C	153 mm	17 days	80%	6 hrs	Calm	Monsoon transition. More evening showers.
June	+ Good	27–32°C	117 mm	15 days	78%	5.5 hrs	Calm	Southwest monsoon active but the Gulf coast is sheltered. Short showers.
July	± Fair	27–32°C	122 mm	16 days	79%	5.5 hrs	Calm	Mostly dry. Short afternoon showers possible.
August	± Fair	27–31°C	137 mm	16 days	80%	5.5 hrs	Calm	Short storms. Much drier than the Andaman coast.
September	− Poor	26–31°C	183 mm	19 days	83%	4.8 hrs	Moderate	Increasing rainfall. Cloudiest month with the least sun.
October	− Poor	26–30°C	300 mm	20 days	85%	5 hrs	Moderate	Northeast monsoon arrives. Heavy rain and a rising sea.
November	− Poor	26–30°C	281 mm	20 days	86%	5 hrs	Rough	Peak rainy season. Rough sea, possible flooding and ferry disruptions.
December	± Fair	25–29°C	152 mm	14 days	83%	5.5 hrs	Moderate	Rain eases through the month. The dry season returns at the end of December.

🌴 Koh Chang

Gulf of Thailand · East coast · Trat province

Best time: Nov–Mar Dry: Nov–Mar Wet: May–Oct

Rainfall per month (mm); colour = weather score

Koh Chang: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	20–31°C	20 mm	3 days	74%	9 hrs	Calm	Driest month. Cool and sunny, some haze from burning in Cambodia.
February	++ Excellent	21–33°C	50 mm	5 days	72%	9 hrs	Calm	Sunny and dry. Chance of hazy days from air pollution from Cambodia.
March	+ Good	23–33°C	90 mm	7 days	74%	9 hrs	Calm	Warm and mostly dry. One of the sunniest months.
April	+ Good	24–33°C	120 mm	9 days	77%	9 hrs	Calm	Hottest month together with March. Night-time thunderstorms increase.
May	− Poor	24–31°C	350 mm	20 days	80%	8 hrs	Moderate	Rainy season starts mid-month. Rainfall shoots up.
June	− Poor	23–30°C	550 mm	23 days	82%	7 hrs	Rough	Rainy season established. Heavy showers mostly at night, afternoons often dry.
July	− Poor	23–30°C	550 mm	21 days	82%	7 hrs	Rough	Wettest period. Steady rain, but often sun during the day.
August	− Poor	23–30°C	550 mm	23 days	83%	7 hrs	Rough	Similar to July. Lots of rain, yet also plenty of sunshine hours.
September	− Poor	22–29°C	550 mm	22 days	85%	6 hrs	Rough	Worst weather of the year. Highest chance of storms and flooding.
October	− Poor	23–30°C	300 mm	20 days	83%	7 hrs	Moderate	Rainy season winds down. How wet it is varies a lot from year to year.
November	++ Excellent	21–30°C	50 mm	5 days	78%	9 hrs	Moderate	Transition to the dry season. Northerly wind, one of the best months.
December	++ Excellent	20–30°C	30 mm	3 days	72%	9 hrs	Calm	Dry and sunny by day, cool in the evening thanks to the northerly wind.

🏝️ Koh Samui

Gulf of Thailand · South · Surat Thani province

Best time: Dec–Mar Dry: Jan–Sep Wet: Oct–Dec

Rainfall per month (mm); colour = weather score

Koh Samui: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	+ Good	24–29°C	86 mm	11 days	80%	7 hrs	Calm	Warm and pleasant. Comfortable temperatures, coolest month of the year.
February	+ Good	25–29°C	54 mm	5 days	78%	8 hrs	Calm	Driest month. Sunny and quiet, ideal beach weather.
March	+ Good	26–31°C	81 mm	4 days	77%	8 hrs	Calm	Warm and dry. One of the most comfortable months for temperature.
April	+ Good	26–33°C	83 mm	8 days	77%	8 hrs	Calm	Temperatures rise, still little rain.
May	± Fair	26–33°C	156 mm	16 days	78%	7 hrs	Moderate	Very sunny, but rainfall increases towards summer.
June	± Fair	26–32°C	124 mm	15 days	77%	6 hrs	Moderate	Hot. Rain stays moderate, mostly brief showers.
July	+ Good	25–32°C	116 mm	15 days	77%	6 hrs	Moderate	Similar to June. Warm with moderate rainfall.
August	+ Good	25–32°C	111 mm	15 days	78%	6 hrs	Moderate	Slightly more pleasant than July. Regular short showers.
September	± Fair	25–31°C	122 mm	16 days	79%	6 hrs	Moderate	Last month before the short rainy season.
October	− Poor	24–30°C	310 mm	20 days	82%	5 hrs	Rough	Short rainy season starts. Rainfall doubles, more cloud.
November	− Poor	24–29°C	507 mm	20 days	85%	4 hrs	Rough	Peak rainy season: the shortest in Thailand, but heavy.
December	− Poor	24–30°C	210 mm	15 days	82%	6 hrs	Moderate	Rain drops quickly. High season begins, pleasantly cool.

🏙️ Bangkok

Central Thailand · Capital · Chao Phraya delta

Best time: Nov–Feb Dry: Nov–Feb Wet: May–Oct

Rainfall per month (mm); colour = weather score

Bangkok: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	22–32°C	10 mm	1 days	70%	9 hrs	n/a	Coolest and driest month. Pleasant, little smog yet.
February	++ Excellent	24–33°C	10 mm	2 days	72%	8 hrs	n/a	Warming up, still dry. Air pollution (fine dust) increases.
March	++ Excellent	25–34°C	50 mm	4 days	71%	9 hrs	n/a	Hot and oppressive. The first thunderstorms break the heat.
April	+ Good	26–35°C	110 mm	7 days	73%	8 hrs	n/a	Hottest month. Songkran water festival, scorching afternoons.
May	± Fair	26–34°C	180 mm	15 days	74%	8 hrs	n/a	Rainy season starts. Heavy afternoon showers, cooling but humid.
June	± Fair	26–33°C	180 mm	15 days	75%	6 hrs	n/a	Rainy season established. Daily short, heavy downpours.
July	± Fair	25–32°C	180 mm	16 days	75%	5 hrs	n/a	Similar to June. Steady rainfall, muggy.
August	± Fair	25–32°C	170 mm	17 days	75%	5 hrs	n/a	Still wet. Chance of local flooding in the city.
September	− Poor	25–32°C	220 mm	19 days	79%	5 hrs	n/a	Wettest month. Highest chance of flooded streets.
October	± Fair	24–31°C	190 mm	16 days	79%	6 hrs	n/a	Rain eases. The Chao Phraya can run high after rain peaks.
November	++ Excellent	23–31°C	40 mm	5 days	72%	8 hrs	n/a	Transition to the dry season. Pleasant and clearer.
December	++ Excellent	22–31°C	10 mm	1 days	67%	9 hrs	n/a	Driest, most pleasant month. Peak tourist season.

⛰️ Chiang Mai

Northern Thailand · Mountainous · Ping River

Best time: Nov–Feb Dry: Nov–Feb Wet: May–Oct

Rainfall per month (mm); colour = weather score

Chiang Mai: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	15–29°C	4 mm	1 days	68%	8.8 hrs	n/a	Coolest month. Cold mornings (sometimes below 15°C), sunny days.
February	++ Excellent	17–32°C	9 mm	1 days	58%	9.1 hrs	n/a	Dry and sunny, but the 'burning season' smoke haze begins.
March	++ Excellent	20–35°C	18 mm	2 days	52%	9.5 hrs	n/a	Peak air pollution from crop burning. Hot and hazy.
April	+ Good	23–36°C	57 mm	7 days	57%	9.3 hrs	n/a	Hottest month. Songkran festival, end of the smoke haze.
May	± Fair	24–34°C	162 mm	15 days	71%	6.4 hrs	n/a	Rainy season starts. Fresh green mountains, less smoke.
June	± Fair	24–32°C	125 mm	17 days	77%	5.2 hrs	n/a	Rainy. Clear mornings, afternoon showers in the hills.
July	− Poor	24–31°C	140 mm	19 days	79%	3.9 hrs	n/a	Wet and cloudy. Lush green, cooler temperatures.
August	− Poor	24–31°C	217 mm	21 days	81%	3.8 hrs	n/a	Wettest period. Lots of cloud, least sunshine of the year.
September	− Poor	23–31°C	211 mm	18 days	81%	4.8 hrs	n/a	Still wet. Rice fields in full growth.
October	+ Good	22–30°C	118 mm	12 days	79%	6.5 hrs	n/a	Rain eases. Transition, the green surroundings remain.
November	+ Good	18–29°C	54 mm	5 days	75%	7.2 hrs	n/a	Dry season begins. Cooler evenings, clearer air.
December	++ Excellent	15–28°C	16 mm	1 days	73%	8.2 hrs	n/a	Cool and dry. Fresh mornings, ideal for temple tours.

🏖️ Phuket

Andaman coast · Island · Phuket Town and coast

Best time: Dec–Mar Dry: Dec–Apr Wet: May–Nov

Rainfall per month (mm); colour = weather score

Phuket: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	25–33°C	50 mm	4 days	76%	9 hrs	Calm	Dry and sunny. Peak high season, calm clear sea.
February	++ Excellent	25–34°C	24 mm	2 days	74%	8.7 hrs	Calm	Driest month. Excellent diving and beach weather.
March	+ Good	26–34°C	81 mm	6 days	76%	8.9 hrs	Calm	Warmer, still mostly dry. The sea stays calm.
April	± Fair	26–34°C	135 mm	10 days	79%	8 hrs	Moderate	Hottest month. Songkran, first monsoon thunderstorms.
May	− Poor	26–33°C	237 mm	16 days	81%	5.1 hrs	Rough	Southwest monsoon begins. Rainfall rises sharply, sea gets restless.
June	− Poor	26–33°C	249 mm	16 days	82%	3.9 hrs	Rough	Rainy season. Waves on the west coast, suitable for surfing.
July	− Poor	26–32°C	240 mm	16 days	82%	3.9 hrs	Rough	Wet and windy. Red flags on west-coast beaches.
August	− Poor	26–32°C	309 mm	17 days	82%	3.8 hrs	Rough	Windiest month. Lots of rain, rough sea on the west coast.
September	− Poor	25–32°C	350 mm	19 days	84%	3.6 hrs	Rough	Wettest and cloudiest month. Peak rainy season.
October	− Poor	25–32°C	336 mm	19 days	85%	5.8 hrs	Rough	Still very wet. Highest humidity of the year.
November	± Fair	25–32°C	178 mm	13 days	83%	7.3 hrs	Moderate	Rain eases. Transition to the dry season.
December	+ Good	25–32°C	82 mm	8 days	79%	8.4 hrs	Calm	Dry season returns. Sea calms down, peak tourist season.

🎡 Pattaya

Gulf of Thailand · East coast · Chonburi province

Best time: Nov–Feb Dry: Nov–Apr Wet: May–Oct

Rainfall per month (mm); colour = weather score

Pattaya: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	23–31°C	20 mm	3 days	68%	9 hrs	Calm	Dry and sunny. Comfortable temperatures, peak high season.
February	++ Excellent	24–31°C	15 mm	2 days	68%	9 hrs	Calm	Still dry, warming up gradually. Calm sea.
March	++ Excellent	26–32°C	25 mm	4 days	69%	9 hrs	Calm	Warmer, the odd shower. Still pleasant beach weather.
April	++ Excellent	27–33°C	40 mm	6 days	70%	8 hrs	Calm	Hottest month. Songkran festival, oppressive heat.
May	± Fair	27–32°C	150 mm	14 days	75%	6 hrs	Moderate	Rainy season starts. Shorter heavy showers, low season begins.
June	± Fair	26–32°C	130 mm	13 days	76%	6 hrs	Moderate	Rainy but bearable. Fewer tourists, lower prices.
July	± Fair	26–31°C	180 mm	16 days	77%	5 hrs	Moderate	More rain. Afternoon showers, humid air.
August	± Fair	26–31°C	200 mm	17 days	78%	5 hrs	Moderate	Wet. Frequent downpours, brief but intense.
September	− Poor	25–30°C	210 mm	18 days	79%	4.5 hrs	Rough	Wettest month. Heaviest rainfall, choppier sea.
October	± Fair	25–30°C	160 mm	15 days	78%	5.5 hrs	Moderate	Rain slowly eases. Still changeable.
November	+ Good	24–30°C	70 mm	8 days	72%	7 hrs	Moderate	Transition to the dry season. More pleasant and drier.
December	++ Excellent	23–29°C	30 mm	3 days	68%	8.5 hrs	Calm	Dry and fresh. High season begins, Christmas and New Year crowds.

🏛️ Ayutthaya

Central Thailand · Chao Phraya plain · near Bangkok

Best time: Nov–Feb Dry: Nov–Feb Wet: May–Oct

Rainfall per month (mm); colour = weather score

Ayutthaya: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	21–34°C	4 mm	4 days	65%	9 hrs	n/a	Dry and pleasant. Cooler mornings, ideal for temples.
February	++ Excellent	23–35°C	10 mm	1 days	63%	10 hrs	n/a	Warming up, still dry. Comfortable for walking around.
March	++ Excellent	24–36°C	50 mm	6 days	62%	9 hrs	n/a	Hot, first showers.
April	+ Good	25–37°C	101 mm	9 days	63%	10 hrs	n/a	Hottest month. Songkran, scorching heat on the ruins.
May	− Poor	25–35°C	211 mm	14 days	70%	11 hrs	n/a	Rainy season starts. Heavier showers, temples in the green.
June	± Fair	25–34°C	182 mm	14 days	74%	10 hrs	n/a	Rainy. Oppressive heat between the showers.
July	− Poor	25–33°C	228 mm	18 days	75%	8 hrs	n/a	Wet. Frequent downpours, lush green around the ruins.
August	− Poor	25–33°C	302 mm	17 days	77%	7 hrs	n/a	Very wet. Chance of local flooding in heavy rain.
September	− Poor	25–33°C	330 mm	18 days	80%	7 hrs	n/a	Wettest month. The Chao Phraya can rise considerably.
October	− Poor	24–33°C	162 mm	20 days	78%	7 hrs	n/a	Rain eases, but flood risk remains because of high water.
November	++ Excellent	23–33°C	19 mm	8 days	70%	7 hrs	n/a	Transition to the dry season. Water falls, pleasant weather.
December	++ Excellent	21–32°C	3 mm	2 days	65%	7 hrs	n/a	Dry and cool. Best month for visiting temples.

🌄 Chiang Rai

Northern Thailand · Golden Triangle · mountainous

Best time: Nov–Feb Dry: Nov–Feb Wet: May–Oct

Rainfall per month (mm); colour = weather score

Chiang Rai: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	13–29°C	11 mm	2 days	65%	8 hrs	n/a	Coldest month. Chance of night frost in the hills, sunny.
February	++ Excellent	14–31°C	15 mm	2 days	55%	9 hrs	n/a	Dry and sunny. Start of the crop-burning smoke haze.
March	++ Excellent	17–34°C	33 mm	4 days	50%	10 hrs	n/a	Peak air pollution. Hot, hazy skies from agricultural fires.
April	+ Good	21–35°C	84 mm	8 days	55%	11 hrs	n/a	Hottest month. Songkran, smoke gradually clears.
May	± Fair	22–33°C	198 mm	15 days	68%	11 hrs	n/a	Rainy season starts. Fresher and greener, less smoke.
June	± Fair	24–32°C	172 mm	16 days	75%	9 hrs	n/a	Rainy. Lush rice fields and tea plantations.
July	− Poor	24–31°C	287 mm	19 days	78%	8 hrs	n/a	Wet. Frequent showers, green mountains in the Golden Triangle.
August	− Poor	23–31°C	321 mm	20 days	80%	8 hrs	n/a	Wettest month. Heavy rainfall, the occasional mudslide.
September	− Poor	23–31°C	272 mm	18 days	80%	8 hrs	n/a	Still wet. Lush landscape, fewer tourists.
October	± Fair	21–31°C	121 mm	12 days	76%	8 hrs	n/a	Rain eases. Transition month, pleasantly fresh.
November	++ Excellent	17–29°C	47 mm	5 days	70%	7 hrs	n/a	Dry season begins. Cool fresh evenings.
December	++ Excellent	14–28°C	12 mm	2 days	68%	7 hrs	n/a	Cold and dry. Morning mist in the valleys, the most beautiful light.

🪨 Krabi

Andaman coast · South · Krabi Town and surroundings

Best time: Dec–Mar Dry: Dec–Apr Wet: May–Nov

Rainfall per month (mm); colour = weather score

Krabi: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	25–33°C	32 mm	12 days	76%	8 hrs	Calm	Dry and warm. Calm sea, ideal for island trips.
February	++ Excellent	25–34°C	19 mm	6 days	74%	9 hrs	Calm	Driest month. Clear water, top diving conditions.
March	+ Good	26–34°C	57 mm	8 days	76%	9 hrs	Calm	Warmer, still mostly dry. The sea stays calm.
April	+ Good	26–34°C	105 mm	15 days	79%	10 hrs	Moderate	Hottest month. First showers announce the monsoon.
May	− Poor	26–33°C	215 mm	20 days	81%	9 hrs	Rough	Southwest monsoon begins. Rainfall rises, sea gets restless.
June	− Poor	26–32°C	214 mm	19 days	82%	9 hrs	Rough	Rainy season. Shorter heavy showers, green limestone cliffs.
July	− Poor	25–32°C	216 mm	20 days	82%	8 hrs	Rough	Wet. Changeable weather, the occasional fierce storm.
August	− Poor	26–32°C	230 mm	20 days	82%	9 hrs	Rough	Still wet. Frequent showers, moderate wind.
September	− Poor	25–32°C	280 mm	21 days	84%	8 hrs	Rough	Peak rainfall. Rough sea, boat trips sometimes cancelled.
October	− Poor	25–31°C	298 mm	22 days	85%	8 hrs	Rough	Wettest month. Highest humidity of the year.
November	− Poor	25–32°C	148 mm	19 days	83%	8 hrs	Moderate	Rain eases. Transition to the dry season.
December	+ Good	25–32°C	59 mm	17 days	79%	8 hrs	Calm	Dry season returns. Sea calms down, high season begins.

🌉 Kanchanaburi

Western Thailand · River Kwai · hilly border region

Best time: Nov–Feb Dry: Nov–Feb Wet: May–Oct

Rainfall per month (mm); colour = weather score

Kanchanaburi: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	20–33°C	2 mm	1 days	60%	9 hrs	n/a	Dry and cool. Fresh mornings on the River Kwai.
February	++ Excellent	22–35°C	10 mm	2 days	55%	9 hrs	n/a	Warming up, still dry. Pleasant for the bridge and waterfalls.
March	++ Excellent	24–37°C	30 mm	5 days	55%	9 hrs	n/a	Hot, first showers. Waterfalls still quiet because of low water.
April	+ Good	26–38°C	75 mm	8 days	58%	9 hrs	n/a	Hottest month, the warmest of all 15 destinations. Songkran, scorching afternoons.
May	± Fair	26–36°C	135 mm	14 days	65%	8 hrs	n/a	Rainy season starts. Waterfalls start flowing again.
June	+ Good	25–35°C	105 mm	13 days	70%	7 hrs	n/a	Rainy, but less intense than on the coast. Green landscape.
July	+ Good	25–34°C	100 mm	13 days	72%	7 hrs	n/a	Wet, moderate. Erawan Falls at their most beautiful.
August	+ Good	25–34°C	95 mm	14 days	73%	7 hrs	n/a	Still rainy. Lush jungle landscape around the river.
September	± Fair	25–34°C	190 mm	18 days	78%	6 hrs	n/a	Wettest month. High water level on the River Kwai.
October	± Fair	24–32°C	170 mm	16 days	75%	7 hrs	n/a	Rain eases. Lush green, waterfalls at full power.
November	++ Excellent	22–32°C	45 mm	5 days	65%	8 hrs	n/a	Transition to the dry season. Pleasant and drier.
December	++ Excellent	20–32°C	5 mm	1 days	60%	9 hrs	n/a	Dry and cool. Best month for the war cemeteries.

🐘 Buri Ram

Isaan · Northeastern plateau · near the Cambodian border

Best time: Nov–Feb Dry: Nov–Feb Wet: May–Oct

Rainfall per month (mm); colour = weather score

Buri Ram: Weather and climate in Thailand
Month	Score	Temperature	Rainfall	Rainy days	Humidity	Sun hours/day	Sea	Notes
January	++ Excellent	18–31°C	8 mm	1 days	62%	8 hrs	n/a	Cool and dry. Fresh mornings on the Khorat plateau.
February	++ Excellent	20–34°C	10 mm	2 days	58%	8 hrs	n/a	Warms up quickly, still dry. Pleasant for temple tours.
March	+ Good	23–36°C	56 mm	5 days	58%	8 hrs	n/a	Hot, first thunderstorms. The dry Isaan plain turns brown.
April	+ Good	24–37°C	81 mm	8 days	62%	8 hrs	n/a	Hottest month. Songkran, scorching heat on the plateau.
May	− Poor	24–35°C	203 mm	15 days	70%	7 hrs	n/a	Rainy season starts. Rice seedlings begin, the landscape turns green.
June	± Fair	25–34°C	198 mm	14 days	72%	6 hrs	n/a	Rainy. Good growing weather for the rice fields.
July	− Poor	24–33°C	224 mm	16 days	74%	5 hrs	n/a	Wet. Frequent showers over the Isaan plain.
August	− Poor	24–33°C	254 mm	18 days	76%	5 hrs	n/a	Very wet. Plenty of green rice fields around Buriram.
September	− Poor	24–32°C	302 mm	22 days	80%	5 hrs	n/a	Wettest month. Peak rainfall, the occasional local flooding.
October	+ Good	23–31°C	107 mm	14 days	76%	6 hrs	n/a	Rain eases. Rice harvest approaches, pleasant weather.
November	++ Excellent	21–31°C	30 mm	4 days	66%	7 hrs	n/a	Transition to the dry season. Rice harvest, clear weather.
December	++ Excellent	18–30°C	13 mm	1 days	60%	8 hrs	n/a	Cool and dry. Coldest month, pleasant for trips across the plateau.

Sources and method

The figures are historical climate averages (30–50 years) taken from our earlier climate overview. Actual weather can differ.

Sources: Weather & Climate, WeatherAtlas, WeatherSpark, Holiday Weather, SunPope, KhaoLak Center and Climate-Data.

Weather score (our own scale): Excellent = at most 50 mm of rain; Good = 51–120 mm; Fair = 121–200 mm; Poor = more than 200 mm, more than 18 rainy days or a rough sea. Temperature, smoke and air pollution are not part of the score.

Frequently asked questions

What is the best time to visit Thailand?

For most destinations, November to February is the driest and most pleasant season. The southwest coast (Phuket, Krabi, Khao Lak) is dry then too. On Koh Samui, November is the wettest month; according to the figures below it is driest there from February to April.

When is the rainy season in Thailand?

The rainy season runs roughly from May to October. The exception is the Gulf coast around Koh Samui and Khanom, where October and November are the wettest.

What is the hottest month in Thailand?

For most destinations April is the hottest month. According to these figures Kanchanaburi is the warmest in April: 38°C on average by day.

Where is it driest during the rainy season?

Of the 15 destinations, the least rain falls from May to October in Hua Hin, Kanchanaburi and 1.

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