Chiang Mai Climate by Month
Chiang Mai, Thailand
Hot all year, with a rainy season from May to September.
Hot all year, with a rainy season from May to September: that's Chiang Mai's climate in short. Expect highs of 98°F (36°C) in April and 85°F (29°C) in December, with the coldest nights (January) near 58°F (14°C). Of the 41 in (1051 mm) of rain in a typical year, 77% falls from May to September. December to February are almost completely dry.
- Warmest month
- 98°F(36°C)
- Average high, April
- Coldest nights
- 58°F(14°C)
- Average low, January
- Rain per year
- 41 in(1051 mm)
- Wettest: August
- Humidity
- 71%
- Sunniest: April
Best and worst months in Chiang Mai
Best for weatherThe most comfortable weather comes in December and January, with highs around 85°F (30°C) and almost no rain.
Least pleasantMay and August are the least pleasant; May is the hottest, with highs of 94°F (35°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in January.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Chiang Mai weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuaryBest | 86°F(30°C) | 58°F(14°C) | 0.1 in(3 mm) | 68% | 4.8 |
| FebFebruary | 91°F(33°C) | 60°F(15°C) | 0.3 in(8 mm) | 60% | 5.6 |
| MarMarch | 95°F(35°C) | 66°F(19°C) | 0.8 in(21 mm) | 56% | 5.8 |
| AprApril | 98°F(36°C) | 73°F(23°C) | 2.3 in(58 mm) | 61% | 6.1 |
| MayMay | 94°F(35°C) | 74°F(24°C) | 6.1 in(154 mm) | 70% | 5.5 |
| JunJune | 92°F(33°C) | 76°F(24°C) | 4.5 in(114 mm) | 71% | 4.8 |
| JulJuly | 90°F(32°C) | 75°F(24°C) | 6.4 in(162 mm) | 74% | 4.2 |
| AugAugust | 89°F(32°C) | 74°F(24°C) | 7.8 in(199 mm) | 79% | 4.4 |
| SepSeptember | 90°F(32°C) | 74°F(23°C) | 7.1 in(181 mm) | 78% | 4.6 |
| OctOctober | 89°F(32°C) | 72°F(22°C) | 4.3 in(109 mm) | 79% | 4.8 |
| NovNovember | 88°F(31°C) | 66°F(19°C) | 1.3 in(33 mm) | 76% | 4.7 |
| DecDecemberBest | 85°F(29°C) | 60°F(16°C) | 0.4 in(9 mm) | 74% | 4.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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