How extreme does Chiang Mai's weather get?

The hottest, coldest, wettest and snowiest days Chiang Mai has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 34 years of daily weather observations (1991–present), from the Chiang Mai Intl station 3 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Chiang Mai has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

109°F May 11, 2016

That is about 14°F hotter than a normal May afternoon in Chiang Mai (typical high near 94°F).

The three most extreme on record

1 109°F May 11, 2016

2 109°F Apr 30, 2024

3 108°F May 1, 2005

❄️ Coldest night

37°F Jan 5, 1994

About 22°F colder than a normal January night in Chiang Mai (typical low near 59°F).

The three most extreme on record

1 37°F Jan 5, 1994

2 39°F Dec 25, 1999

3 42°F Dec 26, 1999

🌧️ Most rain in one day

8.50 in Sep 15, 1994

About 96% of a typical September's rain in a single day (Chiang Mai averages roughly 8.9 in across the month).

The three most extreme on record

1 8.50 in Sep 15, 1994

2 5.98 in Aug 20, 1994

3 5.98 in May 5, 1995

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

normal range of daily temperatureshottest ever recordedcoldest ever recorded

Chiang Mai's record heat sits well above even a hot day for the season — May's 109°F is about 14°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Chiang Mai's warmest days reach the high 90s°F and its coldest nights drop to the high 50s°F. But across the record it has gone as high as 109°F and as low as 37°F. A single day has delivered over 9 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Chiang Mai Intl, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →

← Chiang Mai city detail