Average annual temperature is 27.7 °C
Absolute maximum temperature: 40.7 °C
Absolute minimum temperature: 15.3 °C
Number of sunny days: 223 days
Number of rainy days: 142 days
Look at detailed online map of Sissau
* Weather data for Sissau 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) | 37.6 | 39.2 | 40.6 | 40.6 | 40.7 | 38.9 | 33.5 | 33.2 | 32.7 | 33.1 | 34.7 | 34.5 |
| Average daytime temperature (°C) | 33.4 | 36.9 | 38.0 | 38.8 | 37.9 | 34.0 | 31.0 | 30.3 | 30.9 | 31.8 | 32.9 | 32.2 |
| Average temperature (°C) | 25.7 | 28.7 | 29.7 | 31.2 | 31.3 | 28.8 | 26.5 | 26.1 | 26.3 | 27.0 | 26.3 | 24.4 |
| Average night temperature (°C) | 19.0 | 20.9 | 21.8 | 24.3 | 26.1 | 25.0 | 23.7 | 23.4 | 23.3 | 23.5 | 20.3 | 17.8 |
| Absolute minimum temperature (°C) | 15.7 | 18.1 | 19.0 | 22.3 | 22.8 | 23.6 | 22.6 | 22.1 | 22.5 | 22.2 | 16.0 | 15.3 |
| 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) | 11.5 | 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) | 10.0 | 10.3 | 10.6 | 10.8 | 9.4 | 8.9 | 7.9 | 7.0 | 8.1 | 9.2 | 10.2 | 9.9 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 7 | 111 | 227 | 379 | 351 | 201 | 3 | 1 |
| Sunny days | 31 | 28 | 31 | 30 | 23 | 11 | 2 | 1 | 1 | 8 | 27 | 30 |
| Rainy days | 0 | 0 | 0 | 0 | 8 | 19 | 29 | 30 | 29 | 23 | 3 | 1 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Sissau is at