Best time to visit Chiang Mai

The best time to visit Chiang Mai is from mid-November to early-March, when the region is mainly dry and not too hot, typically averaging 28°C (82°F).

Chiang Mai weather

Chiang Mai enjoys a hot tropical climate with a winter dry season. You can expect warm temperatures year-round, seasonal rainfal and three distinct seasons.

The hot season lasts from mid-March to early-May, with an average daily high above 35°C (95°F). Rainfall is low until May when the monsoon rains provide welcome relief to the soaring temperatures.

The rainy season lasts from late-April to mid-October, with a greater than 31% chance of a given day being a wet day. The wet season averages 32°C (89°F) and is characterised by plenty of sunshine interspersed by heavy downpours, which are over quickly.

The cool, dry season from mid-October to late-April is generally warm, with daytime temperatures ranging from a high of 30°C (86°F) to a low of around 15°C (59°F).

Which is the hottest month in Chiang Mai?
The hottest month of the year in Chiang Mai is usually April, when maximum daytime temperatures usually reach 36°C (96°F), with extreme heat and humidity and a low of 23°C (73°F).

Which is the coldest month in Chiang Mai?
December and January are the 'coldest' months of the year in Chiang Mai, with an average high of 29°C (84°F) and a low of 15°C (42°F). Humidity is low with almost no rain and bright sunshine averages 9 hours every day.

Which is the sunniest month in Chiang Mai?
The sunniest time of year in Chiang Mai is usually February with an average of 10 hours of sunshine per day; that's on average 85% of daylight hours.

Which month has the most rain in Chiang Mai?
August is usually the wettest month in Chiang Mai, with 176mm of rainfall on average. There are normally 18 days in August with some rain.

The heaviest rainfall in Chiang Mai falls during the months of July through September.

Which is the windiest month in Chiang Mai?
March is the windiest month. However, the average hourly wind speed in Chiang Mai does not vary significantly over the course of the year, averaging 4 kilometres per hour throughout (2 knots) the year.

What's the best time for activities?
Rafting is best between July and October when most rivers are swollen with monsoon rain. Both biking and trekking are best in the dry season from November to early-March – but bring a sweater, as nights in northern Thailand can get pretty chilly.

Chiang Mai – Monthly Weather

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average daily max temp (°C)
29 32 35 36 34 32 31 31 31 31 30 28
Average daily min temp (°C)
15 17 20 23 24 24 24 24 24 22 19 16
Average daily sunshine (hrs)
9 10 9 9 8 6 5 5 6 7 8 8
Comfort level
Moderately warm icon Moderately hot icon Extreme heat & humidity icon Extreme heat & humidity icon Extreme heat & humidity icon High heat & humidity icon Moderately hot icon Moderately hot icon Moderately hot icon Moderately hot icon Moderately hot icon Moderately warm icon
Average relative humidity (%)
70 55 55 60 75 80 80 85 85 80 75 75
Average UV Index
9 11 11 11 11 11 11 11 11 11 9 8
Days with some rainfall
1 1 2 7 14 13 15 18 16 10 3 1
Average rainfall (mm)
5 5 16 51 133 109 120 176 180 88 35 9
Average wind speed (km/h)
4 4 4 4 4 4 4 4 3 3 4 4
Chiang Mai, Thailand

Holiday seasons

High season: Peak tourist season runs from November to late March, with peaks in July and August.

Low season: Avoid the crowds and take advantage of discounted room rates during April to June, September and October.

Chiang Mai Weather – Monthly Review

January February March April
May June July August
September October November December

Note: Meteorological data is sourced from the United States National Oceanic and Atmospheric Administration (NOAA) and the World Meteorological Organization (WMO), with additional historical climate data sourced from the Thai Meteorological Department.

Latest update: Best time to visit Chiang Mai: 2 June, 2022