Average annual temperature is 28.2 °C
Absolute maximum temperature: 41.5 °C
Absolute minimum temperature: 15.8 °C
Number of sunny days: 232 days
Number of rainy days: 133 days
Look at detailed online map of Cassum
* Weather data for Cassum 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) | 37.8 | 38.9 | 40.3 | 41.5 | 40.5 | 38.8 | 34.3 | 33.0 | 33.1 | 34.8 | 36.3 | 35.7 |
| Average daytime temperature (°C) | 33.9 | 37.2 | 38.3 | 39.1 | 38.0 | 33.9 | 31.4 | 30.6 | 30.9 | 32.7 | 34.6 | 33.4 |
| Average temperature (°C) | 26.1 | 29.1 | 30.4 | 32.1 | 32.0 | 29.1 | 27.0 | 26.3 | 26.5 | 27.7 | 27.4 | 25.3 |
| Average night temperature (°C) | 19.6 | 21.3 | 22.6 | 25.1 | 26.6 | 25.2 | 24.0 | 23.6 | 23.4 | 23.9 | 20.7 | 18.8 |
| Absolute minimum temperature (°C) | 16.5 | 18.6 | 20.2 | 23.4 | 23.7 | 23.5 | 23.2 | 22.5 | 22.4 | 22.9 | 16.8 | 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 | 12.9 | 12.8 | 12.5 | 12.2 | 11.8 | 11.5 | 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 | 10.5 | 10.7 | 9.8 | 9.3 | 8.1 | 7.8 | 8.4 | 9.6 | 10.5 | 10.0 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 7 | 95 | 199 | 365 | 272 | 142 | 0 | 1 |
| Sunny days | 31 | 28 | 31 | 30 | 26 | 10 | 1 | 2 | 2 | 11 | 30 | 30 |
| Rainy days | 0 | 0 | 0 | 0 | 5 | 20 | 30 | 29 | 28 | 20 | 0 | 1 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Cassum is at