Average annual temperature is 26.4 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: 18.8 °C
Number of sunny days: 107 days
Number of rainy days: 258 days
Look at detailed online map of Bisau
* Weather data for Bisau 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 | 34.6 | 34.6 | 34.8 | 34.9 | 32.2 | 31.9 | 30.8 | 31.5 | 32.2 | 33.3 | 36.3 |
| Average daytime temperature (°C) | 33.8 | 33.2 | 32.5 | 32.9 | 31.7 | 29.7 | 29.2 | 28.3 | 29.7 | 30.5 | 31.1 | 33.4 |
| Average temperature (°C) | 26.6 | 27.3 | 27.2 | 27.9 | 27.3 | 25.7 | 25.3 | 25.1 | 25.5 | 25.8 | 26.6 | 26.9 |
| Average night temperature (°C) | 21.8 | 23.1 | 23.6 | 24.5 | 24.5 | 23.4 | 23.1 | 23.1 | 23.2 | 23.3 | 23.6 | 22.6 |
| Absolute minimum temperature (°C) | 19.3 | 21.5 | 21.4 | 23.4 | 23.6 | 22.2 | 22.2 | 22.2 | 22.2 | 22.5 | 22.7 | 18.8 |
| 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 | 11.8 | 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) | 9.8 | 9.8 | 9.7 | 9.3 | 8.0 | 6.9 | 7.1 | 5.3 | 6.7 | 7.3 | 8.4 | 9.8 |
| Precipitation (mm) | 0 | 1 | 21 | 64 | 360 | 497 | 556 | 649 | 434 | 411 | 114 | 5 |
| Sunny days | 29 | 24 | 19 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 23 |
| Rainy days | 2 | 4 | 12 | 23 | 31 | 30 | 31 | 31 | 30 | 31 | 25 | 8 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Bisau is at