Thailand climate by month
8-year averages · when to visit| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bangkok | 32° | 32° | 33° | 34° | 33° | 33° | 32° | 31° | 31° | 31° | 31° | 32° |
| Phuket | 30° | 32° | 33° | 32° | 31° | 30° | 30° | 30° | 29° | 29° | 29° | 29° |
| Koh Samui | 26° | 26° | 28° | 29° | 29° | 29° | 29° | 29° | 27° | 26° | 26° | 25° |
| Chiang Mai | 27° | 30° | 34° | 35° | 34° | 31° | 30° | 29° | 30° | 29° | 29° | 27° |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bangkok | 4 | 7 | 8 | 13 | 21 | 24 | 27 | 27 | 28 | 22 | 10 | 4 |
| Phuket | 10 | 7 | 12 | 19 | 26 | 22 | 21 | 22 | 24 | 29 | 26 | 17 |
| Koh Samui | 18 | 15 | 11 | 16 | 20 | 17 | 18 | 19 | 21 | 28 | 25 | 19 |
| Chiang Mai | 4 | 2 | 2 | 7 | 20 | 27 | 28 | 30 | 26 | 17 | 9 | 3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Phuket | 29° | 30° | 31° | 31° | 32° | 31° | 30° | 31° | 30° | 30° | 30° | 29° |
| Koh Samui | 29° | 29° | 30° | 32° | 32° | 31° | 31° | 31° | 30° | 30° | 29° | 29° |
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
Bangkok climate in September
8-year averages · when to visitBest months: January–March, May–June, August–December · September: Good
| August | September | October | |
|---|---|---|---|
| Average temperature | ▼ 28°C | 27°C | → 27°C |
| Typical high | → 31°C | 31°C | → 31°C |
| Typical low | → 25°C | 25°C | ▼ 24°C |
| Precipitation | ▲ 205 mm | 316 mm | ▼ 246 mm |
| Wet days | ▲ 27 d | 28 d | ▼ 22 d |
| Sunshine per day | ▲ 7.7 h | 7.8 h | ▲ 8.8 h |
| Cloud cover | ▼ 39% | 36% | ▼ 25% |
| Midday UV | → 12 | 12 | ▼ 10 |
| Daylight | 12:34 | 12:12 | 11:49 |
| Our take | Good | Good | Good |
September temperatures day by day daily mean + smoothed trend · °C
September precipitation day by day mm
September UV day by day clear-sky midday value
Figures are averaged over 8 years of ERA5 reanalysis; sea temps come from ocean reanalysis, and UV is derived from solar elevation.
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Updated: 8:26 PM
Thailand · 12 weather points · Climate reference: Bangkok (13.76°N, 100.50°E) · Asia/Bangkok