Average annual temperature is 27.2 °C
Absolute maximum temperature: 40.1 °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 Rossum
* Weather data for Rossum 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) | 37.0 | 39.3 | 40.1 | 40.0 | 38.7 | 34.5 | 32.4 | 30.9 | 32.3 | 33.1 | 34.7 | 35.3 |
| Average daytime temperature (°C) | 33.1 | 35.6 | 33.9 | 35.2 | 33.5 | 31.6 | 29.6 | 28.9 | 30.1 | 30.9 | 32.6 | 33.3 |
| Average temperature (°C) | 25.8 | 27.8 | 27.2 | 28.8 | 28.9 | 28.2 | 26.7 | 26.3 | 26.7 | 27.3 | 26.9 | 25.8 |
| Average night temperature (°C) | 19.8 | 21.5 | 21.7 | 23.7 | 25.4 | 25.8 | 24.5 | 24.4 | 24.5 | 24.7 | 21.8 | 19.6 |
| Absolute minimum temperature (°C) | 17.1 | 19.5 | 19.5 | 21.1 | 22.7 | 24.4 | 23.5 | 23.6 | 23.2 | 23.6 | 16.6 | 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 | 12.7 | 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 | 10.7 | 10.8 | 10.9 | 9.5 | 9.5 | 8.3 | 7.3 | 8.4 | 8.7 | 10.1 | 9.8 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 60 | 282 | 362 | 252 | 154 | 10 | 0 |
| Sunny days | 31 | 28 | 31 | 30 | 27 | 11 | 0 | 0 | 1 | 6 | 28 | 31 |
| Rainy days | 0 | 0 | 0 | 0 | 4 | 19 | 31 | 31 | 29 | 25 | 2 | 0 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Rossum is at