gowhereandwhen.comBangkok and Chiang Mai
Compare November to January for less heat and rain. Check Chiang Mai air quality later in the dry season.
November to January suits Bangkok and Chiang Mai. For islands, compare Phuket and Ko Samui: their wettest months differ.
Bangkok weather by month
AvoidFairGoodGreatIdeal
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
A 0 to 100 comfort rating from daytime heat, overnight chill, rainfall and storm risk, for Bangkok. Higher is better. Some booking links earn us a commission, at no extra cost to you.
Bangkok weather
Nov–FebCompare cooler city days.
Phuket coast
Nov–AprLess rain than its wet season.
Ko Samui coast
Feb–AprLess rain than November.
Thailand weather by place
The score above uses Bangkok. Compare the north and both coasts before choosing a month.
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Average daytime high and monthly rain, 1991–2020
| Month | BangkokCentral | Chiang MaiNorth | PhuketAndaman coast | Ko SamuiGulf coast |
|---|---|---|---|---|
| Jan | 33°C 24 mm rain | 30°C 11 mm rain | 33°C 50 mm rain | 29°C 127 mm rain |
| Feb | 34°C 21 mm rain | 33°C 10 mm rain | 34°C 24 mm rain | 29°C 64 mm rain |
| Mar | 35°C 51 mm rain | 35°C 20 mm rain | 34°C 81 mm rain | 30°C 116 mm rain |
| Apr | 36°C 93 mm rain | 37°C 54 mm rain | 34°C 135 mm rain | 32°C 83 mm rain |
| May | 35°C 217 mm rain | 35°C 168 mm rain | 33°C 237 mm rain | 33°C 132 mm rain |
| Jun | 34°C 199 mm rain | 33°C 118 mm rain | 33°C 249 mm rain | 33°C 134 mm rain |
| Jul | 34°C 190 mm rain | 32°C 149 mm rain | 32°C 240 mm rain | 32°C 117 mm rain |
| Aug | 33°C 227 mm rain | 32°C 223 mm rain | 32°C 309 mm rain | 32°C 102 mm rain |
| Sep | 33°C 336 mm rain | 32°C 207 mm rain | 32°C 350 mm rain | 32°C 118 mm rain |
| Oct | 33°C 289 mm rain | 32°C 124 mm rain | 32°C 336 mm rain | 31°C 295 mm rain |
| Nov | 33°C 45 mm rain | 31°C 41 mm rain | 32°C 178 mm rain | 30°C 445 mm rain |
| Dec | 32°C 12 mm rain | 29°C 14 mm rain | 32°C 82 mm rain | 29°C 263 mm rain |
In November, Ko Samui averages 445 mm of rain; Phuket averages 178 mm. Phuket is wetter from May to October.
These four stations miss inland areas, mountains and many islands. Rain averages cannot show sea conditions. Check Chiang Mai air quality from February to April.
Sources and weather limits
Thai Meteorological Department station averages cover 1991–2020. Highs are mean daily highs; rain is the mean monthly total. The report uses stations with more than ten years of observations in that period. These are past averages, not forecasts. The Bangkok score uses separate inputs.
Thai Meteorological Department station report (Bangkok p. 51, Chiang Mai p. 5, Phuket p. 82, Ko Samui p. 71) · Thailand tourism weather guide · Phuket season guidance · Northern haze report · Checked October 2026
Thailand weather by month: Bangkok
Highs, lows, rainfall and the rating, for Bangkok.
JanuaryHot and dryIdeal 87
- Daytime high
- 32°C / 90°F
- Overnight low
- 22°C / 72°F
- Rainfall
- 15 mm
Hot and dry.
FebruaryHot and dry.Ideal 80
- Daytime high
- 33°C / 91°F
- Overnight low
- 24°C / 75°F
- Rainfall
- 20 mm
Hot and dry.
MarchVery hot and dry.Great 73
- Daytime high
- 34°C / 93°F
- Overnight low
- 25°C / 77°F
- Rainfall
- 40 mm
Very hot and dry.
AprilVery hot with a little rain.Great 62
- Daytime high
- 35°C / 95°F
- Overnight low
- 27°C / 81°F
- Rainfall
- 90 mm
Very hot with a little rain.
MayVery hot and very wet, monsoon rains.Fair 37
- Daytime high
- 34°C / 93°F
- Overnight low
- 26°C / 79°F
- Rainfall
- 250 mm
Very hot and very wet, monsoon rains.
JuneHot and wet.Good 53
- Daytime high
- 33°C / 91°F
- Overnight low
- 26°C / 79°F
- Rainfall
- 150 mm
Hot and wet.
JulyHot and wet.Good 54
- Daytime high
- 32°C / 90°F
- Overnight low
- 25°C / 77°F
- Rainfall
- 155 mm
Hot and wet.
AugustHot and wet.Good 48
- Daytime high
- 32°C / 90°F
- Overnight low
- 25°C / 77°F
- Rainfall
- 200 mm
Hot and wet.
SeptemberHot and very wet, monsoon rains.Fair 30
- Daytime high
- 32°C / 90°F
- Overnight low
- 25°C / 77°F
- Rainfall
- 330 mm
Hot and very wet, monsoon rains.
OctoberHot and very wet, monsoon rains.Fair 36
- Daytime high
- 31°C / 88°F
- Overnight low
- 24°C / 75°F
- Rainfall
- 290 mm
Hot and very wet, monsoon rains.
NovemberHot with a little rainIdeal 89
- Daytime high
- 31°C / 88°F
- Overnight low
- 23°C / 73°F
- Rainfall
- 55 mm
Hot with a little rain.
DecemberHot and dryIdeal 90
- Daytime high
- 31°C / 88°F
- Overnight low
- 21°C / 70°F
- Rainfall
- 10 mm
Hot and dry.
Choose your trip
Phuket
Compare November to April for less rain. Check sea conditions.
Ko Samui
Compare February to April. November is much wetter.
Songkran in April
Thai New Year celebrations include water play. Bangkok and Chiang Mai are hot in April. Check local event dates.
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Good to know
What is the best time to visit Thailand?
Compare November to January for Bangkok and Chiang Mai. Check Phuket and Ko Samui separately for islands.
When is the monsoon in Thailand?
Phuket is wetter from May to October. Ko Samui has a later rain peak, especially in November.
Is April a good time to visit Thailand?
April brings Songkran, but Bangkok and Chiang Mai are hot. Compare weather by place before you go.
Where else, and when
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Plan another month or destination
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