Chiang Mai weather in September
Warm and pleasant, with frequent heavy rain. Average highs of 29°C and lows of 23°C, with around 25 rainy days expected throughout the month.
While September isn't our top-rated month for Chiang Mai, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
29°C
Average low
23°C
Rainy days
25 days
Best months to visit
January, February, March, November, December
What to do in Chiang Mai in September
Whatever the weather, Chiang Mai rewards curious visitors. Here are some of the best ways to spend your time:
Visit iconic Chiang Mai attractions and temples
Explore local markets and traditional neighborhoods
Experience regional cuisine and dining specialties
Trek or hike nearby mountains or natural features
Engage with local culture and minority communities
Photography opportunities at scenic viewpoints
What to pack for September
Light layers work well — T-shirts and shorts for the day, a light jacket for evenings. Comfortable walking shoes are a must. Bring a compact umbrella just in case.
Browse other months
Recommended
January
27C
Warm and pleasant, and mostly sunny skies.
Recommended
February
30C
Hot and humid, and mostly sunny skies.
Recommended
March
34C
Hot and humid, and mostly sunny skies.
April
35C
Very hot, with occasional showers.
May
34C
Hot and humid, with regular rainfall.
June
31C
Hot and humid, with frequent heavy rain.
July
30C
Hot and humid, with frequent heavy rain.
August
29C
Warm and pleasant, with frequent heavy rain.
September (you are here)
29C
Warm and pleasant, with frequent heavy rain.
October
29C
Warm and pleasant, with regular rainfall.
Recommended
November
29C
Warm and pleasant, with occasional showers.
Recommended
December
27C
Warm and pleasant, and mostly sunny skies.
Book your September trip to Chiang Mai
Find hotels, tours and experiences for the perfect escape.
