Average annual temperature is 27.3 °C
Absolute maximum temperature: 40.3 °C
Absolute minimum temperature: 15.5 °C
Number of sunny days: 222 days
Number of rainy days: 143 days
Look at detailed online map of Biassa
* Weather data for Biassa Guinea-Bissau is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 37.2 | 39.1 | 40.3 | 40.3 | 39.7 | 38.6 | 33.9 | 33.4 | 33.5 | 34.1 | 35.3 | 34.4 |
| Average daytime temperature (°C) | 33.2 | 36.9 | 37.5 | 38.3 | 36.7 | 33.7 | 31.1 | 30.5 | 31.4 | 32.4 | 33.4 | 32.3 |
| Average temperature (°C) | 25.1 | 28.0 | 28.8 | 30.4 | 30.3 | 28.5 | 26.5 | 25.9 | 26.4 | 27.1 | 26.2 | 24.3 |
| Average night temperature (°C) | 18.7 | 20.4 | 21.5 | 23.8 | 25.5 | 25.0 | 23.7 | 23.4 | 23.4 | 23.6 | 20.3 | 18.1 |
| Absolute minimum temperature (°C) | 15.5 | 17.4 | 18.5 | 21.3 | 23.1 | 23.8 | 22.6 | 21.6 | 22.3 | 22.3 | 15.7 | 16.2 |
| 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) | 11.5 | 11.7 | 12.1 | 12.4 | 12.7 | 12.8 | 12.8 | 12.5 | 12.2 | 11.9 | 11.6 | 11.4 |
| 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) | 10.1 | 10.6 | 10.6 | 10.9 | 9.4 | 8.8 | 7.8 | 6.6 | 8.1 | 9.0 | 10.1 | 9.8 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 5 | 97 | 240 | 368 | 349 | 179 | 4 | 0 |
| Sunny days | 30 | 28 | 31 | 30 | 24 | 11 | 1 | 1 | 1 | 8 | 27 | 30 |
| Rainy days | 1 | 0 | 0 | 0 | 7 | 19 | 30 | 30 | 29 | 23 | 3 | 1 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Biassa is at