Chiang Mai Weather in September

Chiang Mai in September sees very high daytime temperatures of 33°C (91°F) and nighttime lows of 24°C (75°F). As part of the rainy season, showers are frequent and often heavy. Budget around 249 mm (9.8 in) of rainfall for the month.

Rainfall in Chiang Mai in September

As part of the rainy season, Chiang Mai sees around 18 days of rain in September, with an average of 249 mm (9.8 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.

Temperature in Chiang Mai in September

Daytime highs in Chiang Mai in September reach 33°C (91°F), with nights around 24°C (75°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. With lows around 24°C (75°F), the nights are warm enough that a sheet is usually all you need for bedding.

Sunshine in Chiang Mai in September

The month experiences a moderate amount of sunlight, with 148 hours of sunshine. This provides a nice balance between sunshine and rain.

Wind Speed in Chiang Mai in September

Wind speeds average 1 m/s (2 knots) during September. At this speed, you'll experience mostly light air movement that's just barely noticeable. As an average, some days will be completely calm while others have gentle breezes you can feel on your skin.

If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Chiang Mai. Our weather planner can help you explore destinations with more pleasant weather conditions.