Average annual temperature is 27.4 °C
Absolute maximum temperature: 40.5 °C
Absolute minimum temperature: 15.3 °C
Number of sunny days: 221 days
Number of rainy days: 144 days
Look at detailed online map of Biana
* Weather data for Biana 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) | 37.0 | 39.0 | 40.2 | 40.5 | 39.9 | 38.7 | 33.8 | 33.6 | 33.1 | 34.2 | 35.8 | 35.6 |
| Average daytime temperature (°C) | 33.0 | 36.7 | 37.5 | 38.3 | 37.0 | 33.9 | 31.1 | 30.5 | 31.3 | 32.3 | 33.5 | 33.0 |
| Average temperature (°C) | 24.5 | 27.8 | 29.0 | 30.6 | 30.6 | 28.7 | 26.6 | 26.1 | 26.5 | 27.1 | 26.5 | 24.9 |
| Average night temperature (°C) | 17.7 | 19.9 | 21.6 | 23.9 | 25.7 | 25.0 | 23.8 | 23.6 | 23.5 | 23.8 | 20.6 | 18.5 |
| Absolute minimum temperature (°C) | 15.3 | 16.9 | 19.5 | 21.5 | 23.0 | 23.5 | 22.7 | 22.3 | 22.4 | 22.7 | 17.0 | 16.7 |
| 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 | 9.3 | 8.9 | 7.8 | 7.0 | 8.2 | 9.1 | 10.1 | 9.8 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 6 | 100 | 254 | 344 | 420 | 217 | 4 | 0 |
| Sunny days | 31 | 28 | 31 | 30 | 23 | 11 | 1 | 1 | 2 | 6 | 27 | 30 |
| Rainy days | 0 | 0 | 0 | 0 | 8 | 19 | 30 | 30 | 28 | 25 | 3 | 1 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Biana is at