Average annual temperature is 27.0 °C
Absolute maximum temperature: 40.0 °C
Absolute minimum temperature: 17.4 °C
Number of sunny days: 207 days
Number of rainy days: 158 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) | 36.9 | 38.6 | 39.0 | 40.0 | 36.6 | 34.8 | 32.3 | 32.5 | 32.3 | 33.3 | 35.2 | 35.7 |
| Average daytime temperature (°C) | 33.1 | 35.8 | 34.8 | 35.6 | 33.7 | 31.5 | 29.6 | 29.2 | 30.4 | 31.1 | 33.1 | 33.2 |
| Average temperature (°C) | 25.5 | 27.5 | 27.4 | 28.8 | 28.8 | 27.9 | 26.2 | 25.9 | 26.3 | 26.9 | 27.5 | 26.0 |
| Average night temperature (°C) | 20.1 | 21.4 | 22.5 | 24.2 | 25.7 | 25.6 | 23.8 | 23.9 | 24.0 | 24.3 | 23.1 | 20.6 |
| Absolute minimum temperature (°C) | 17.9 | 19.7 | 20.9 | 22.4 | 23.0 | 24.2 | 22.2 | 22.8 | 22.5 | 23.0 | 19.5 | 17.4 |
| 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 | 11.8 | 12.1 | 12.4 | 12.7 | 12.8 | 12.7 | 12.5 | 12.2 | 11.9 | 11.6 | 11.5 |
| 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 | 10.4 | 10.6 | 11.0 | 9.3 | 8.9 | 7.7 | 6.9 | 8.5 | 8.6 | 9.9 | 9.5 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 22 | 109 | 478 | 429 | 293 | 215 | 17 | 0 |
| Sunny days | 30 | 28 | 31 | 30 | 21 | 8 | 1 | 1 | 1 | 2 | 24 | 30 |
| Rainy days | 1 | 0 | 0 | 0 | 10 | 22 | 30 | 30 | 29 | 29 | 6 | 1 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Biassa is at