Chiang Mai weather in October
October in Chiang Mai: sweltering, rainy, with very humid — a good time to visit.
#7 of 12 months in Chiang Mai · #494 of 604 destinations to visit in October · comfort 63/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Chiang Mai climate normals — October
| Daytime high | 29°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 22°C / 71°F | |
| Feels like (high) | 35°C / 95°F | |
| Rainfall | 149 mm / 5.9 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 22°C / 72°F | |
| Sunshine | 8.9 h/day | |
| Daylight | 11.7 h | |
| Wind | 6 km/h / 4 mph | |
| Air quality (US AQI) | 63 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Chiang Mai in October — FAQ
- Is October a good time to visit Chiang Mai?
- October in Chiang Mai: sweltering, rainy, with very humid — a good time to visit. It ranks #7 of 12 months for Chiang Mai on SeasonMap's comfort score (63/100).
- What is the weather like in Chiang Mai in October?
- In October, Chiang Mai averages a daily high of 29.2°C and a low of 21.9°C, with about 149.4 mm of rain over roughly 17.4 rainy days.
- What is the air quality in Chiang Mai in October?
- Chiang Mai has a mean US Air Quality Index of about 63 in October.