Average annual temperature is 25.7 °C
Absolute maximum temperature: 35.4 °C
Absolute minimum temperature: 18.3 °C
Number of sunny days: 56 days
Number of rainy days: 309 days
Look at detailed online map of Yonni
* Weather data for Yonni 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) | 34.3 | 35.3 | 35.4 | 34.5 | 33.5 | 31.7 | 32.5 | 32.3 | 32.0 | 32.2 | 32.4 | 33.9 |
| Average daytime temperature (°C) | 33.0 | 33.4 | 33.0 | 31.9 | 31.1 | 29.0 | 28.5 | 28.7 | 28.7 | 29.6 | 30.4 | 32.3 |
| Average temperature (°C) | 26.1 | 26.8 | 26.7 | 26.7 | 26.2 | 25.0 | 24.7 | 24.7 | 24.8 | 25.1 | 25.7 | 26.1 |
| Average night temperature (°C) | 21.9 | 22.9 | 23.1 | 23.6 | 23.4 | 22.8 | 22.5 | 22.7 | 22.6 | 22.8 | 22.9 | 21.9 |
| Absolute minimum temperature (°C) | 20.1 | 21.0 | 21.8 | 22.4 | 22.6 | 21.3 | 21.7 | 21.6 | 21.9 | 22.3 | 22.0 | 18.3 |
| 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 | 12.5 | 12.5 | 12.4 | 12.2 | 12.0 | 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) | 9.8 | 9.8 | 8.8 | 8.4 | 7.2 | 6.6 | 6.5 | 5.7 | 6.7 | 7.1 | 8.1 | 10.0 |
| Precipitation (mm) | 6 | 19 | 71 | 178 | 363 | 364 | 530 | 616 | 447 | 351 | 231 | 20 |
| Sunny days | 19 | 11 | 5 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 19 |
| Rainy days | 12 | 17 | 26 | 30 | 30 | 30 | 31 | 31 | 30 | 31 | 29 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Yonni during the most sunny months:
The largest precipitation sum in Yonni is at