Average annual temperature is 27.4 °C
Absolute maximum temperature: 41.3 °C
Absolute minimum temperature: 16.2 °C
Number of sunny days: 224 days
Number of rainy days: 141 days
Look at detailed online map of Grandumbé
* Weather data for Grandumbé 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) | 38.0 | 40.0 | 41.3 | 40.8 | 40.1 | 39.2 | 33.8 | 32.9 | 33.3 | 34.2 | 34.8 | 34.3 |
| Average daytime temperature (°C) | 33.3 | 37.4 | 37.7 | 38.5 | 37.2 | 34.0 | 30.8 | 30.0 | 31.1 | 32.1 | 33.1 | 32.5 |
| Average temperature (°C) | 25.3 | 28.6 | 28.4 | 30.2 | 30.1 | 28.6 | 26.5 | 26.0 | 26.6 | 27.1 | 26.6 | 24.8 |
| Average night temperature (°C) | 19.2 | 21.7 | 21.4 | 23.8 | 25.2 | 25.2 | 23.9 | 23.6 | 23.7 | 23.9 | 21.4 | 18.9 |
| Absolute minimum temperature (°C) | 16.9 | 20.0 | 20.2 | 21.3 | 21.8 | 23.9 | 22.7 | 22.2 | 22.4 | 22.9 | 17.3 | 16.2 |
| 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) | 9.9 | 10.7 | 10.7 | 10.9 | 9.7 | 9.3 | 8.0 | 6.5 | 8.1 | 8.8 | 10.2 | 9.9 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 2 | 87 | 261 | 362 | 260 | 194 | 10 | 0 |
| Sunny days | 31 | 28 | 31 | 30 | 26 | 10 | 1 | 1 | 1 | 6 | 28 | 31 |
| Rainy days | 0 | 0 | 0 | 0 | 5 | 20 | 30 | 30 | 29 | 25 | 2 | 0 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Grandumbé is at