The climate in Suriānwān during September can be summarized as very hot, humid and very wet.
September is in the fall / autumn in Suriānwān and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 34°C (92°F), whilst at night 25°C (76°F) is normal.
| Daytime temperature | 33.6°C 92.4°F |
|---|---|
| Nightly temperature | 24.5°C 76°F |
| Average temperature | 29°C 84.2°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 206 mm 8.1 ins |
| Rainy days | 9 days |
| Sea temperature | 26.7°C 80.1°F |
| Humidity | 78% |
| Windspeed | 5.8kph 4 mph |
On average September is the 3rd wettest month of the year in Suriānwān with around 206mm 8.1 inches of rain making it a very wet time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
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 Suriānwān in September 2025.
Best places to visit in September
| Hottest month: | June | 39.4°C 102.9°F |
|---|---|---|
| Driest month: | April | 4mm 0.2ins |
| Sunniest month: | November | 8.6hrs |
| Coldest month: | January | 23.5°C 74.3°F |
| Wettest month: | July | 297mm 11.7ins |