Average annual temperature is 27.6 °C
Absolute maximum temperature: 40.8 °C
Absolute minimum temperature: 15.8 °C
Number of sunny days: 224 days
Number of rainy days: 141 days
Look at detailed online map of Guelajau
* Weather data for Guelajau 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) | 37.3 | 39.3 | 40.5 | 40.6 | 40.8 | 39.0 | 33.5 | 33.4 | 32.9 | 33.6 | 35.0 | 35.0 |
| Average daytime temperature (°C) | 33.6 | 37.1 | 37.8 | 38.5 | 37.4 | 34.2 | 31.1 | 30.4 | 31.0 | 31.9 | 33.1 | 32.6 |
| Average temperature (°C) | 25.5 | 28.5 | 29.4 | 30.9 | 30.9 | 28.9 | 26.6 | 26.1 | 26.4 | 27.1 | 26.3 | 24.6 |
| Average night temperature (°C) | 18.8 | 20.7 | 21.8 | 24.2 | 26.0 | 25.2 | 23.8 | 23.5 | 23.4 | 23.7 | 20.3 | 17.9 |
| Absolute minimum temperature (°C) | 16.1 | 17.3 | 18.7 | 22.1 | 22.9 | 23.6 | 22.5 | 22.3 | 22.5 | 22.6 | 16.5 | 15.8 |
| 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 | 10.5 | 10.5 | 10.8 | 9.1 | 8.9 | 7.7 | 7.0 | 8.0 | 9.2 | 10.1 | 9.8 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 6 | 100 | 250 | 359 | 407 | 195 | 4 | 1 |
| Sunny days | 31 | 28 | 31 | 30 | 24 | 10 | 1 | 0 | 3 | 9 | 27 | 30 |
| Rainy days | 0 | 0 | 0 | 0 | 7 | 20 | 30 | 31 | 27 | 22 | 3 | 1 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Guelajau is at