Chiang Mai Weather in May
Typical weather, rainfall, and packing tips for Chiang Mai in May
Thailand · May
Chiang Mai Weather in May
May weather in Chiang Mai averages 31°C with 10 rain days and 78% humidity. Pre-monsoon humidity.
Daytime high
34°C
Nighttime low
27°C
Rain days
10 days
UV index
11
When to visit Chiang Mai?
● Great·● Okay·● Avoid
Typical Weather in Chiang Mai in May
Based on 30-year historical averages.
Temperature
Conditions
What to Expect in May
- 1Daytime highs around 34°C, dropping to 27°C at night.
- 2Expect 10 rain days — rain is occasional.
- 3Humidity sits at 78% — quite humid.
- 47 hours of sunshine per day on average.
- 5UV index of 11 — use SPF 50+.
What to Pack for Chiang Mai in May
Best Activities for May Weather
Outdoor sightseeing
Plan outdoor activities for mornings when temperatures are most comfortable.
Indoor attractions
Mix indoor and outdoor experiences for a balanced itinerary.
Food and culture
Spring seasonal dishes and local festivals make May culturally rich.
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Frequently Asked Questions
How we work this out
Temperature and rainfall figures are 30-year meteorological averages. Crowd levels come from national tourism arrival data. Price bands reflect mid-range accommodation and economy flights from major long-haul cities, sampled quarterly.
Last updated 18 July 2026 · Written by the Holicay travel team