Average annual temperature is 27.5 °C
Absolute maximum temperature: 40.7 °C
Absolute minimum temperature: 15.8 °C
Number of sunny days: 230 days
Number of rainy days: 135 days
Look at detailed online map of Olossato
* Weather data for Olossato 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 | 40.7 | 39.5 | 39.5 | 33.8 | 33.6 | 33.1 | 33.5 | 34.9 | 34.7 |
| Average daytime temperature (°C) | 33.2 | 36.9 | 37.9 | 38.6 | 37.7 | 34.7 | 31.2 | 30.3 | 31.1 | 32.1 | 32.9 | 32.4 |
| Average temperature (°C) | 25.1 | 28.4 | 28.8 | 30.5 | 30.7 | 29.0 | 26.8 | 26.2 | 26.7 | 27.3 | 26.2 | 24.5 |
| Average night temperature (°C) | 18.8 | 21.1 | 21.1 | 23.7 | 25.5 | 25.2 | 24.1 | 23.7 | 23.8 | 24.0 | 20.6 | 18.2 |
| Absolute minimum temperature (°C) | 15.8 | 18.3 | 18.5 | 20.8 | 21.6 | 23.9 | 22.7 | 22.7 | 22.4 | 23.1 | 15.8 | 15.9 |
| 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) | 9.8 | 10.7 | 10.8 | 10.9 | 9.9 | 9.3 | 8.1 | 6.5 | 8.4 | 9.0 | 10.2 | 9.9 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 7 | 104 | 186 | 322 | 248 | 182 | 1 | 0 |
| Sunny days | 31 | 28 | 31 | 30 | 26 | 10 | 0 | 1 | 2 | 11 | 29 | 31 |
| Rainy days | 0 | 0 | 0 | 0 | 5 | 20 | 31 | 30 | 28 | 20 | 1 | 0 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Olossato is at