Weather in Koh Samui in January
Koh Samui offers excellent beach weather with frequent rainfall (avg 26°C, 15 rainy days). Weather score: 6.7/10 · Good
Avg temp
26°C
Daytime high
27.6°C
Night low
24.6°C
Rainy days
15
Sun per day
10.3 h
Sea temp
27.9°C
Koh Samui climate table – all 12 months
| Month | Avg temp | High | Low | Rainy days | Sun/day | Score |
|---|---|---|---|---|---|---|
| January | 26°C | 27.6°C | 24.6°C | 15 | 10.3 h | 6.7/10 |
| February | 26.4°C | 28.2°C | 24.8°C | 10 | 10.7 h | 8.6/10 |
| March | 27.4°C | 29.6°C | 25.6°C | 9 | 11 h | 8.6/10 |
| April | 28.4°C | 30.5°C | 26.6°C | 14 | 10.9 h | 7.8/10 |
| May | 28.6°C | 30.7°C | 26.8°C | 19 | 10.7 h | 7.3/10 |
| June | 28.4°C | 30.7°C | 26.6°C | 15 | 10 h | 7.8/10 |
| July | 28.1°C | 30.5°C | 26.3°C | 16 | 9.6 h | 7.8/10 |
| August | 28°C | 30.5°C | 26.2°C | 16 | 9.7 h | 7.8/10 |
| September | 27.3°C | 29.4°C | 25.7°C | 20 | 8.7 h | 7.3/10 |
| October | 26.7°C | 28.5°C | 25.1°C | 27 | 8.9 h | 7.3/10 |
| November | 26.5°C | 28°C | 25°C | 26 | 8.7 h | 7.3/10 |
| December | 26.2°C | 27.7°C | 24.8°C | 20 | 9.7 h | 6.2/10 |
Top alternatives in January
Thailand
Bangkok · ⭐ 10
Cambodia
Siem Reap · ⭐ 10
Vietnam
Ho Chi Minh City · ⭐ 10
Cambodia
Phnom Penh · ⭐ 10
Thailand
Thailand · ⭐ 10
India
Mumbai · ⭐ 10
Frequently asked questions about Koh Samui in January
How warm is it in Koh Samui in January?
In January, Koh Samui averages 26°C, with daytime highs of 27.6°C and night lows of 24.6°C.
Does it rain a lot in Koh Samui in January?
January sees around 15 rainy days and about 125.6 mm of rainfall in Koh Samui.
Is January a good month to visit Koh Samui?
January scores 6.7/10 for Koh Samui. Koh Samui offers excellent beach weather with frequent rainfall (avg 26°C, 15 rainy days).