Siaya Weather in September
What's the weather like in Siaya (Kenya) in September 2025?
The climate in Siaya during September can be summarized as warm and damp.
September is in the fall / autumn in Siaya and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a comfortable 29°C (84°F), whilst at night 15°C (59°F) is normal.
| Daytime temperature | 28.8°C 83.8°F |
|---|---|
| Nightly temperature | 15°C 59°F |
| Average temperature | 21.9°C 71.4°F |
| Daily sunshine | 8.1 hrs |
| Avg rainfall | 104 mm 4.1 ins |
| Rainy days | 16 days |
| Sea temperature | 27.1°C 80.8°F |
| Humidity | 61% |
| Windspeed | 10.4kph 7 mph |
On average September is the 6th driest month of the year in Siaya with around 104mm 4.1 inches of rain making it a damp time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.1 hours of sunshine per day.
September temperatures in Siaya
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 Siaya in September 2025.
Other monthly averages
Best places to visit in September
Siaya weather stats
| Hottest month: | March | 29.9°C 85.8°F |
|---|---|---|
| Driest month: | January | 58mm 2.3ins |
| Sunniest month: | January | 9.1hrs |
| Coldest month: | July | 27.3°C 81.1°F |
| Wettest month: | April | 241mm 9.5ins |
© Google