Chiang Mai weather in September

September is still a good time to visit Chiang Mai despite the hot weather and monsoonal downpours.

You can expect very hot weather and clear blue skies with around five hours of sunshine daily, interspersed with brief tropical downpours that bring some relief to the soaring temperatures.

Daytime temperatures average 28°C (82°F).


How hot is it in Chiang Mai in September?
Maximum daytime temperatures in Chiang Mai in September reach an average high of 32°C (89°F) with high heat and humidity, falling to a night-time low of 23°C (73°F).

How sunny is it in Chiang Mai in September?
There are normally five hours of bright sunshine each day in Chiang Mai in September – that's around 39% of daylight hours.

Sunrise & sunset in September?
Sunrise is around 6:10am with sunset around 6:30pm.

Does it rain in Chiang Mai in September?
There are usually at least 17 days with some rain in Chiang Mai in September; the average monthly rainfall is 200mm (8in).

August and September are the wettest months of the year.

How windy is it in Chiang Mai in September?
September sees an average hourly wind speed of 3 kilometres per hour (2 mph).

What to do in Chiang Mai in September?
Weather conditions in September are excellent for river rafting as the rivers are swollen with monsoon rain, but it’s not so good for trekking and biking the surrounding countryside given the excessive heat, humidity and occasional torrential downpours.

September is still a good time to explore the cobblestoned sois (alleys) of the Old City and the glittering shrine of Wat Phra That Doi Suthep.

Local holidays?
None. This is the low season in Chiang Mai, with discounted hotel prices and fewer visitors. Sightseeing attractions are less crowded. So if you don't mind getting your feet wet and carrying an umbrella, it’s still a good time to visit.


Chiang Mai weather in September

Temperature icon High Temp: 32°C (89°F)
temperature icon Low Temp: 23°C (73°F)
sun icon Sunshine: 5 hours per day
12
Moderately hot icon
Daylight: 12 hours per day
wind icon Wind speed: 3 km/h (2 mph)
umbrella icon Wet Days: 17 days with some rain
rain cloud Rainfall: 200mm (8in) per month
High heat icon Comfort Level: High heat; 85% humidity
11
Moderately hot icon
UV Index: Extreme
Chiang Mai, Thailand

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 weather by month


Note: Meteorological data for Chiang Mai is based on weather statistics gathered for the 30-year period 1991 to 2020, and is sourced from the Thai Meteorological Department at the closest weather station, Chiang Mai International Airport (CNX), located around 5km (3mi) south of the centre of Chiang Mai. Additional climate data is sourced from the World Meteorological Organization (WMO).

Advice on the best time to visit a particular destination is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.


Latest update: Chiang Mai weather in September: 5 October, 2023


Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.



Advertising