Chiang Rai weather in May
May in Chiang Rai: hot, soaked — a gamble, with 19 rainy days.
#8 of 12 months in Chiang Rai · #789 of 897 destinations to visit in May · comfort 62/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Chiang Rai in May
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Chiang Rai climate normals — May
| Daytime high | 34°C / 92°F | 🥵 hot |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Rainfall | 166 mm / 6.6 in | ⛈ soaked |
| Rainy days | 19 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 22°C / 72°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 13.1 h | |
| Wind | 9 km/h / 5 mph | |
| Air quality (US AQI) | 65 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Chiang Rai in May — FAQ
- Is May a good time to visit Chiang Rai?
- May in Chiang Rai: hot, soaked — a gamble, with 19 rainy days. It ranks #8 of 12 months for Chiang Rai on SeasonMap's comfort score (62/100).
- What is the weather like in Chiang Rai in May?
- In May, Chiang Rai averages a daily high of 33.6°C and a low of 24.4°C, with about 166.4 mm of rain over roughly 19 rainy days.
- What is the air quality in Chiang Rai in May?
- Chiang Rai has a mean US Air Quality Index of about 65 in May.