Dumai Weather in September
What's the weather like in Dumai (Riau) in September 2024?
The climate in Dumai during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in Dumai and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a steamy 32°C (90°F), whilst at night 22°C (72°F) is normal.
| Daytime temperature | 32.2°C 89.9°F |
|---|---|
| Nightly temperature | 22.3°C 72.1°F |
| Average temperature | 27.2°C 81°F |
| Daily sunshine | 6.1 hrs |
| Avg rainfall | 218 mm 8.6 ins |
| Rainy days | 17 days |
| Sea temperature | 29.4°C 84.8°F |
| Humidity | 84% |
| Windspeed | 7.2kph 5 mph |
On average September is the 3rd wettest month of the year in Dumai with around 218mm 8.6 inches of rain making it a very wet time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.1 hours of sunshine per day.
September temperatures in Dumai
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Dumai in September 2024.
Other monthly averages
Best places to visit in September
Dumai weather stats
| Hottest month: | March | 32.6°C 90.7°F |
|---|---|---|
| Driest month: | February | 145mm 5.7ins |
| Sunniest month: | May | 7.4hrs |
| Coldest month: | December | 31.1°C 88°F |
| Wettest month: | November | 238mm 9.4ins |
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