Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
September verdict
Chiang Mai, Thailand in September
Weather score50Mixed
Mixed for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 5.5h per day, enough for a balanced month. Rainfall averages 224mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
31°C
Rain
224mm
Sun
5.5h
Weather score
50
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 224mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.5h per day, enough for a balanced month.
Map
Weather map
Compare Chiang Mai, Thailand with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September31°C average high
September is close to Chiang Mai's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsMarch to April
This stretch sets the upper range for average daytime heat.
Rain
September224mm average rain
September is one of Chiang Mai's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to April and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.5 hours average sun
September is below Chiang Mai's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsJanuary to April
This stretch has the strongest sunshine in the monthly averages.
Weather score
September50 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to March and November to December
These months have the strongest weather score in the monthly averages.
