Kertosono Weather in September
What's the weather like in Kertosono (East Java) in September 2025?
The climate in Kertosono during September can be summarized as hot and dry.
September is in the spring in Kertosono and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a warm 33°C (91°F), whilst at night 23°C (73°F) is normal.
| Daytime temperature | 32.8°C 91°F |
|---|---|
| Nightly temperature | 22.7°C 72.8°F |
| Average temperature | 27.7°C 81.9°F |
| Daily sunshine | 10.7 hrs |
| Avg rainfall | 19 mm 0.7 ins |
| Rainy days | 2 days |
| Sea temperature | 27.3°C 81.1°F |
| Humidity | 67% |
| Windspeed | 16.2kph 10 mph |
On average September is the 2nd driest month of the year in Kertosono with around 19mm 0.7 inches of rain making it a dry time to visit. This rainfall is typically spread over 2 days, although this may vary considerably.
On the flip side this corresponds to an average of 10.7 hours of sunshine per day.
September temperatures in Kertosono
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 Kertosono in September 2025.
Other monthly averages
Best places to visit in September
Kertosono weather stats
| Hottest month: | November | 32.9°C 91.2°F |
|---|---|---|
| Driest month: | August | 14mm 0.6ins |
| Sunniest month: | August | 11hrs |
| Coldest month: | July | 31.6°C 88.9°F |
| Wettest month: | February | 312mm 12.3ins |
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