Chiang Mai December weather
Chiang Mai, Thailand · December
Plan for day–night contrast to keep comfort stable
December is usually dry and less humid, making it easy to explore. Daytime still feels warm to hot on many days.
Evenings and mornings can feel mild to cool. If you plan night markets, a light layer helps comfort.
December averages at a glance
Average low
around 16–19°C
Average high
around 28–30°C
Average rainfall
around 0–20 mm
Wet days
about 0–4 days
What to wear in December in Chiang Mai
Actual feel will change with wind and rain, but use the suggestions below to build a comfortable layered outfit.
- • Summer clothing by day, light long sleeve by night is common.
- • A thin layer helps indoors with AC.
- • For mountain trips, consider one extra layer.
Travel tips for visiting Chiang Mai in December
- • Comfortable weather can make you overbook your day—set rest points intentionally.
- • Keep a light layer in your bag for evening cooling and indoor AC.
December weather in Chiang Mai — FAQ
Q. Are December nights cold?
A. They can feel cool for some people, especially compared to Bangkok. A light layer is usually enough.
Q. Is the air clear in December?
A. Often clearer in the dry season, but conditions vary year to year.
Explore Chiang Mai
These pages are connected so you can compare conditions and decide for yourself.