Thailand climate by month
8-year averages · when to visit| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bangkok | 90° | 90° | 91° | 93° | 91° | 91° | 90° | 88° | 88° | 88° | 88° | 90° |
| Phuket | 86° | 90° | 91° | 90° | 88° | 86° | 86° | 86° | 84° | 84° | 84° | 84° |
| Koh Samui | 79° | 79° | 82° | 84° | 84° | 84° | 84° | 84° | 81° | 79° | 79° | 77° |
| Chiang Mai | 81° | 86° | 93° | 95° | 93° | 88° | 86° | 84° | 86° | 84° | 84° | 81° |
| 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 | 85° | 86° | 87° | 89° | 89° | 87° | 87° | 87° | 85° | 86° | 85° | 85° |
| Koh Samui | 84° | 85° | 86° | 89° | 90° | 88° | 87° | 88° | 86° | 87° | 85° | 83° |
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 | ▼ 82°F | 81°F | → 81°F |
| Typical high | → 88°F | 88°F | → 88°F |
| Typical low | → 77°F | 77°F | ▼ 75°F |
| Precipitation | ▲ 8.1 in | 12.4 in | ▼ 9.7 in |
| 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 · °F
September precipitation day by day in
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: 7:09 PM
Thailand · 12 weather points · Climate reference: Bangkok (13.76°N, 100.50°E) · Asia/Bangkok