Average annual temperature is 27.7 °C
Absolute maximum temperature: 40.5 °C
Absolute minimum temperature: 15.5 °C
Number of sunny days: 217 days
Number of rainy days: 148 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) | 37.7 | 39.1 | 40.3 | 40.5 | 40.3 | 39.0 | 33.8 | 33.0 | 32.6 | 33.2 | 35.8 | 34.4 |
| Average daytime temperature (°C) | 33.6 | 36.7 | 37.7 | 38.5 | 37.5 | 34.0 | 31.1 | 30.3 | 30.7 | 31.7 | 33.4 | 32.7 |
| Average temperature (°C) | 25.9 | 28.5 | 29.3 | 31.0 | 31.1 | 28.8 | 26.6 | 26.1 | 26.2 | 27.0 | 26.6 | 24.9 |
| Average night temperature (°C) | 19.3 | 20.7 | 21.5 | 24.1 | 26.0 | 25.0 | 23.6 | 23.4 | 23.3 | 23.6 | 20.4 | 18.4 |
| Absolute minimum temperature (°C) | 15.5 | 18.3 | 19.6 | 22.2 | 22.9 | 23.8 | 22.6 | 22.4 | 22.5 | 22.6 | 16.2 | 16.0 |
| 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 | 10.3 | 10.5 | 10.7 | 9.6 | 8.9 | 8.0 | 7.1 | 8.2 | 9.1 | 10.2 | 9.9 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 7 | 95 | 214 | 369 | 408 | 145 | 3 | 1 |
| Sunny days | 31 | 28 | 31 | 29 | 21 | 8 | 1 | 1 | 1 | 8 | 28 | 30 |
| Rainy days | 0 | 0 | 0 | 1 | 10 | 22 | 30 | 30 | 29 | 23 | 2 | 1 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Janã is at