Average annual temperature is 25.9 °C
Absolute maximum temperature: 38.9 °C
Absolute minimum temperature: 16.8 °C
Number of sunny days: 94 days
Number of rainy days: 271 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) | 36.8 | 38.0 | 38.9 | 35.4 | 33.7 | 32.7 | 32.8 | 32.0 | 31.9 | 31.5 | 33.2 | 35.3 |
| Average daytime temperature (°C) | 35.1 | 36.4 | 34.4 | 33.1 | 31.5 | 29.5 | 29.3 | 28.5 | 29.1 | 29.6 | 30.3 | 32.8 |
| Average temperature (°C) | 26.7 | 28.7 | 27.4 | 27.0 | 26.3 | 24.9 | 24.6 | 24.4 | 24.7 | 25.1 | 25.6 | 25.7 |
| Average night temperature (°C) | 20.0 | 22.9 | 22.8 | 23.6 | 23.4 | 22.7 | 22.5 | 22.5 | 22.6 | 22.7 | 22.6 | 20.0 |
| Absolute minimum temperature (°C) | 16.8 | 21.6 | 20.4 | 22.3 | 22.6 | 21.5 | 21.2 | 21.4 | 21.5 | 21.8 | 21.1 | 16.8 |
| 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) | 9.9 | 9.9 | 8.8 | 8.4 | 7.6 | 7.2 | 6.6 | 5.2 | 6.9 | 7.8 | 8.2 | 10.1 |
| Precipitation (mm) | 5 | 0 | 66 | 226 | 315 | 278 | 344 | 493 | 361 | 338 | 154 | 6 |
| Sunny days | 26 | 24 | 13 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 23 |
| Rainy days | 5 | 4 | 18 | 25 | 31 | 30 | 31 | 31 | 30 | 31 | 27 | 8 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Koyama during the most sunny months:
The largest precipitation sum in Koyama is at