Weather in Udon Thani in September 2025
- September is usually the wettest month of the year in Udon Thani;
Average weather
Average temperature in Udon Thani in September
The expected average maximum temperature in September is +31°C with a maximum of +35°C and a minimum of +24°C.
The average maximum temperature goes down 27% by the end of the month, compared with the beginning of the month, from +34°C to +31°C.
Is Udon Thani warm or cold in September?
Udon Thani is typically hot in September.
Maximum temperatures go up compared to the previous month from +31°C to +31°C. The minimum temperature also goes up from +25°C to +25°C.
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 Udon Thani:
Climate in Udon Thani in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +31°C | +31°C | +31°C | ||||
| Min. temperature | ||||||
| +23°C | +21°C | +15°C | ||||
| Max. temperature | ||||||
| +37°C | +36°C | +36°C | ||||
| Rainfall | ||||||
| 277 mm | 270 mm | 106 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 83% | 84% | 79% | ||||
| Air pressure | ||||||
| 1005 HPa | 1007 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 0 | 0 | 5 | ||||
| Cloudy days | ||||||
| 1 | 2 | 7 | ||||
| Rainy days | ||||||
| 23 | 22 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. The temperature levels stay the same in the area of +31°C for average maximum temperature during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 277 mm to 270 mm. Humidity rises from 83% to 84%. The average wind speed doesn’t change much during September, staying around 1 m/s. The amount of sunny days stay about the same, averaging 0 sunny days during the month.
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 Udon Thani is gradually increasing during September, going from 1 m/s to 1 m/s over the course of the month.
Rain
How was the weather last September in Udon Thani?
Climate Change over Years
The climate in Udon Thani in September has not changed much over the last 43 years.
The average temperature was the lowest in 1996 (+31°C) and the highest in 2019 (+33°C). The driest year was 1993 with only 1065 mm of rainfall, and the wettest year was 2002 with 1837 mm.
FAQ
Is September a good time to visit Udon Thani?
Can you sunbathe in Udon Thani in September?
Is Udon Thani rainy in September?
Is it sunny in Udon Thani in September?
Other cities in Thailand
Monthly weather in Udon Thani
Source of the data
For this page, we’ve looked at the typical weather in Udon Thani, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
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.