Average annual temperature is 28.3 °C
Absolute maximum temperature: 42.1 °C
Absolute minimum temperature: 15.4 °C
Number of sunny days: 229 days
Number of rainy days: 136 days
Look at detailed online map of Janã
* Weather data for Janã 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) | 38.4 | 39.6 | 41.3 | 42.1 | 41.8 | 40.7 | 34.6 | 33.1 | 32.8 | 33.8 | 35.1 | 35.0 |
| Average daytime temperature (°C) | 33.9 | 37.8 | 39.0 | 39.7 | 39.0 | 34.9 | 31.5 | 30.5 | 30.8 | 31.9 | 33.3 | 32.8 |
| Average temperature (°C) | 26.2 | 29.6 | 30.7 | 32.3 | 32.4 | 29.6 | 27.2 | 26.4 | 26.5 | 27.4 | 26.5 | 25.4 |
| Average night temperature (°C) | 19.5 | 21.6 | 22.6 | 25.1 | 26.8 | 25.4 | 24.3 | 23.7 | 23.5 | 23.8 | 20.3 | 18.5 |
| Absolute minimum temperature (°C) | 16.4 | 19.2 | 20.2 | 23.3 | 23.4 | 24.2 | 23.1 | 22.7 | 22.6 | 22.7 | 15.6 | 15.4 |
| 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 | 10.4 | 10.6 | 10.8 | 9.7 | 9.3 | 8.3 | 7.9 | 8.4 | 9.3 | 10.3 | 9.8 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 9 | 100 | 173 | 362 | 362 | 121 | 0 | 0 |
| Sunny days | 31 | 28 | 31 | 30 | 22 | 11 | 2 | 2 | 3 | 10 | 29 | 30 |
| Rainy days | 0 | 0 | 0 | 0 | 9 | 19 | 29 | 29 | 27 | 21 | 1 | 1 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Janã is at