Average annual temperature is 25.9 °C
Absolute maximum temperature: 38.0 °C
Absolute minimum temperature: 17.2 °C
Number of sunny days: 86 days
Number of rainy days: 279 days
Look at detailed online map of Koyama
* Weather data for Koyama 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) | 36.7 | 37.6 | 38.0 | 35.5 | 34.1 | 32.5 | 32.5 | 32.2 | 31.9 | 31.3 | 32.0 | 35.4 |
| Average daytime temperature (°C) | 35.0 | 36.1 | 34.4 | 33.1 | 31.5 | 29.7 | 29.2 | 28.5 | 29.2 | 29.4 | 30.2 | 32.8 |
| Average temperature (°C) | 26.8 | 28.4 | 27.3 | 26.8 | 26.3 | 24.9 | 24.7 | 24.4 | 24.7 | 25.1 | 25.6 | 25.9 |
| Average night temperature (°C) | 20.7 | 23.0 | 22.9 | 23.5 | 23.4 | 22.7 | 22.5 | 22.5 | 22.6 | 22.7 | 22.9 | 20.8 |
| Absolute minimum temperature (°C) | 17.5 | 21.6 | 20.6 | 22.6 | 22.6 | 21.5 | 21.3 | 21.4 | 21.6 | 21.8 | 22.0 | 17.2 |
| 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 | 12.5 | 12.4 | 12.2 | 11.9 | 11.8 | 11.7 |
| 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) | 9.7 | 9.8 | 8.3 | 8.0 | 7.5 | 7.0 | 6.9 | 5.5 | 6.7 | 7.5 | 8.0 | 9.8 |
| Precipitation (mm) | 6 | 1 | 76 | 172 | 317 | 299 | 390 | 547 | 366 | 377 | 171 | 6 |
| Sunny days | 23 | 23 | 11 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 23 |
| Rainy days | 8 | 5 | 20 | 28 | 30 | 30 | 31 | 31 | 30 | 31 | 27 | 8 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Koyama is at