Chiang Mai weather in May
May in Chiang Mai: sweltering, a little rain — a good time to visit.
#9 of 12 months in Chiang Mai · #527 of 604 destinations to visit in May · comfort 60/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Chiang Mai climate normals — May
| Daytime high | 35°C / 95°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 78°F | |
| Feels like (high) | 39°C / 102°F | |
| Rainfall | 60 mm / 2.4 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 70% | 💧 humid |
| Dew point | 22°C / 71°F | |
| Sunshine | 11 h/day | |
| Daylight | 13 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 67 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Chiang Mai in May — FAQ
- Is May a good time to visit Chiang Mai?
- May in Chiang Mai: sweltering, a little rain — a good time to visit. It ranks #9 of 12 months for Chiang Mai on SeasonMap's comfort score (60/100).
- What is the weather like in Chiang Mai in May?
- In May, Chiang Mai averages a daily high of 34.8°C and a low of 25.3°C, with about 59.8 mm of rain over roughly 9.4 rainy days.
- What is the air quality in Chiang Mai in May?
- Chiang Mai has a mean US Air Quality Index of about 67 in May.