Chiang Mai weather in December
December in Chiang Mai: hot, dry — one of the best months to visit.
#2 of 12 months in Chiang Mai · #57 of 604 destinations to visit in December · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Chiang Mai climate normals — December
| Daytime high | 28°C / 82°F | 🥵 hot |
|---|---|---|
| Nighttime low | 16°C / 61°F | |
| Feels like (high) | 30°C / 86°F | |
| Rainfall | 3 mm / 0.1 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 10 h/day | |
| Daylight | 11 h | |
| Wind | 7 km/h / 4 mph | |
| Air quality (US AQI) | 79 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Chiang Mai in December — FAQ
- Is December a good time to visit Chiang Mai?
- December in Chiang Mai: hot, dry — one of the best months to visit. It ranks #2 of 12 months for Chiang Mai on SeasonMap's comfort score (86/100).
- What is the weather like in Chiang Mai in December?
- In December, Chiang Mai averages a daily high of 27.5°C and a low of 16°C, with about 3.3 mm of rain over roughly 0.6 rainy days.
- What is the air quality in Chiang Mai in December?
- Chiang Mai has a mean US Air Quality Index of about 79 in December.