Weather in Chiang Mai in September 2024
- September is usually the wettest month of the year in Chiang Mai;
Average weather
Average temperature in Chiang Mai in September
Going from a maximum of +93°F during the day to a minimum of +73°F during the night, the temperature in September averages around +88°F.
The average maximum temperature goes down 18% by the end of the month, compared with the beginning of the month, from +90°F to +86°F.
Is Chiang Mai warm or cold in September?
Chiang Mai is typically hot in September.
Maximum temperatures go down compared to the previous month from +90°F to +90°F. The minimum temperature also goes down from +77°F to +75°F.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
Take a look at how September is compared to other months in Chiang Mai:
Climate in Chiang Mai in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +90°F | +90°F | +88°F | ||||
| Min. temperature | ||||||
| +72°F | +68°F | +59°F | ||||
| Max. temperature | ||||||
| +100°F | +97°F | +99°F | ||||
| Rainfall | ||||||
| 221 mm | 187 mm | 111 mm | ||||
| Wind | ||||||
| 0 m/s | 0 m/s | 0 m/s | ||||
| Humidity | ||||||
| 77% | 78% | 76% | ||||
| Air pressure | ||||||
| 1005 HPa | 1007 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 0 | 1 | 7 | ||||
| Cloudy days | ||||||
| 10 | 11 | 14 | ||||
| Rainy days | ||||||
| 21 | 18 | 10 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. The temperature levels stay the same in the area of +90°F for average maximum temperature during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 221 mm to 187 mm. Humidity rises from 77% to 78%. The average wind speed doesn’t change much during September, staying around 0 m/s. The good news is there are likely to be more sunny days in September, from 0 to 1.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 1 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Chiang Mai is gradually increasing during September, going from 1 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Chiang Mai?
Climate Change Over the Years
The climate in Chiang Mai in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1982 (+90°F) and the highest in 2014 (+95°F). The driest year was 2018 with only 93 mm of rainfall, and the wettest year was 2020 with 383 mm.
FAQ
Is September a good time to visit Chiang Mai?
Can you sunbathe in Chiang Mai in September?
Is Chiang Mai rainy in September?
Is it sunny in Chiang Mai in September?
Other cities in Thailand
Monthly weather in Chiang Mai
Source of the data
For this page, we’ve looked at the typical weather in Chiang Mai, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.