Average annual temperature is 21.4 °C
Absolute maximum temperature: 33.1 °C
Absolute minimum temperature: 15.2 °C
Number of sunny days: 46
Number of rainy days: 319
Number of snow days:
Average annual precipitation: 1460 mm
Look at detailed online map of Siaya
* Weather data for Siaya Kenya is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 31.4 | 33.1 | 32 | 29.2 | 28.7 | 28.4 | 29.6 | 31.5 | 29.5 | 32 | 27.7 | 30.3 |
| Average daytime temperature (°C) | 28.3 | 29.8 | 26.3 | 26 | 26.9 | 26.3 | 27.1 | 28.5 | 27.2 | 28.2 | 25.9 | 26.5 |
| Average temperature (°C) | 21.3 | 22.7 | 20.8 | 20.9 | 21.3 | 20.9 | 21.2 | 22.3 | 21.3 | 22 | 20.7 | 21.3 |
| Average night temperature (°C) | 16.6 | 17.8 | 17.1 | 17.6 | 17.1 | 17 | 16.9 | 17.5 | 17.2 | 18 | 17.3 | 17.6 |
| Absolute minimum temperature (°C) | 15.2 | 15.5 | 15.9 | 16.3 | 15.9 | 16 | 15.6 | 15.8 | 15.9 | 16.9 | 16.4 | 16.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Daylight mean duration (h) | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Daylight minimum duration (h) | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Sunshine mean duration (h) | 11.3 | 11.3 | 10 | 9.6 | 10.8 | 10.6 | 10.8 | 11.1 | 10.7 | 10.5 | 9.9 | 10.5 |
| Precipitation (mm) | 28 | 36 | 288 | 263 | 83 | 92 | 58 | 35 | 129 | 148 | 189 | 113 |
| Sunny days | 12 | 12 | 5 | 2 | 4 | 5 | 3 | 2 | 1 | |||
| Rainy days | 19 | 16 | 26 | 28 | 27 | 30 | 26 | 28 | 30 | 29 | 30 | 30 |
The largest precipitation sum in Siaya is at