Average annual temperature is 24.8 °C
Absolute maximum temperature: 37.9 °C
Absolute minimum temperature: 17.3 °C
Number of sunny days: 87 days
Number of rainy days: 278 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) | 35.6 | 36.6 | 37.9 | 34.1 | 32.7 | 32.2 | 31.1 | 31.3 | 31.1 | 30.3 | 31.6 | 34.1 |
| Average daytime temperature (°C) | 33.9 | 35.1 | 33.1 | 31.9 | 30.7 | 28.6 | 28.3 | 27.3 | 28.0 | 28.5 | 29.3 | 31.9 |
| Average temperature (°C) | 25.9 | 27.3 | 26.1 | 25.7 | 25.2 | 23.7 | 23.4 | 23.2 | 23.5 | 23.9 | 24.5 | 25.3 |
| Average night temperature (°C) | 20.1 | 21.7 | 21.6 | 22.3 | 22.3 | 21.5 | 21.3 | 21.3 | 21.4 | 21.6 | 21.7 | 20.3 |
| Absolute minimum temperature (°C) | 17.5 | 20.4 | 19.9 | 21.1 | 21.5 | 20.0 | 20.6 | 20.4 | 20.5 | 20.5 | 20.5 | 17.3 |
| 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 | 9.8 | 8.7 | 8.5 | 7.7 | 6.5 | 6.5 | 5.2 | 6.5 | 7.4 | 8.1 | 10.1 |
| Precipitation (mm) | 7 | 4 | 85 | 185 | 312 | 298 | 336 | 539 | 333 | 433 | 156 | 11 |
| Sunny days | 25 | 20 | 10 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 25 |
| Rainy days | 6 | 8 | 21 | 26 | 31 | 30 | 31 | 31 | 30 | 31 | 27 | 6 |
| 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