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Weather & Climate
Ko Samui, Surat Thani, Thailand
Overview
Climate data and monthly weather averages for Ko Samui.
Key Metrics
Annual Avg
28°C
Summer Avg
28.4°C
Winter Avg
27°C
Record High
33.3°C
Record Low
23.6°C
Annual Precipitation
2088.7 mm
Avg Humidity
80%
Summer Humidity
80%
Winter Humidity
80%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 29.1° | 26.8° | 23.6° | 135.5 | 80% | 142 | 56.2 |
| Feb | 29.8° | 27.1° | 24.4° | 38.1 | 79% | 156 | 42.6 |
| Mar | 31.4° | 27.9° | 25.1° | 114.4 | 78% | 184 | 44.5 |
| Apr | 32.9° | 29° | 26.2° | 90.3 | 77% | 174 | 45.4 |
| May | 33.3° | 29.2° | 26.8° | 169.9 | 78% | 162 | 48 |
| Jun | 31.5° | 28.7° | 26.1° | 167.1 | 80% | 149 | 37.2 |
| Jul | 31.2° | 28.3° | 25.8° | 166.2 | 80% | 151 | 40 |
| Aug | 30.8° | 28.1° | 25.6° | 144.2 | 81% | 153 | 45.1 |
| Sep | 30.5° | 27.9° | 25.3° | 180.6 | 81% | 148 | 47.2 |
| Oct | 30° | 27.7° | 25.8° | 245.8 | 81% | 137 | 42.2 |
| Nov | 29.9° | 27.7° | 25.4° | 375 | 81% | 117 | 45.4 |
| Dec | 29.7° | 27.2° | 24.2° | 261.6 | 80% | 118 | 57.3 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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