Average annual temperature is 25.0 °C
Absolute maximum temperature: 36.6 °C
Absolute minimum temperature: 17.1 °C
Number of sunny days: 110 days
Number of rainy days: 255 days
Look at detailed online map of Koiyima
* Weather data for Koiyima Sierra Leone is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 34.6 | 35.3 | 36.6 | 33.9 | 33.2 | 31.4 | 30.6 | 30.6 | 30.7 | 30.8 | 31.8 | 33.9 |
| Average daytime temperature (°C) | 32.7 | 33.7 | 32.5 | 32.0 | 30.6 | 28.4 | 28.4 | 27.8 | 28.5 | 28.9 | 29.5 | 31.3 |
| Average temperature (°C) | 25.6 | 27.1 | 26.2 | 26.2 | 25.6 | 24.1 | 23.8 | 23.7 | 24.0 | 24.4 | 24.8 | 25.1 |
| Average night temperature (°C) | 19.6 | 21.4 | 21.6 | 22.7 | 22.5 | 21.8 | 21.5 | 21.5 | 21.6 | 21.6 | 21.6 | 20.0 |
| Absolute minimum temperature (°C) | 17.1 | 19.5 | 19.8 | 21.5 | 21.4 | 21.1 | 20.6 | 20.6 | 21.0 | 21.0 | 20.3 | 17.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.0 | 9.9 | 8.8 | 8.7 | 8.0 | 6.7 | 7.5 | 6.3 | 7.9 | 8.5 | 8.7 | 10.4 |
| Precipitation (mm) | 43 | 0 | 79 | 187 | 286 | 302 | 371 | 465 | 283 | 282 | 99 | 4 |
| Sunny days | 28 | 25 | 13 | 4 | 1 | 0 | 0 | 1 | 0 | 1 | 8 | 29 |
| Rainy days | 3 | 3 | 18 | 26 | 30 | 30 | 31 | 30 | 30 | 30 | 22 | 2 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Koiyima is at