Average annual temperature is 29.2 °C
Absolute maximum temperature: 44.5 °C
Absolute minimum temperature: 12.9 °C
Number of sunny days: 302 days
Number of rainy days: 63 days
Look at detailed online map of Koseyri
* Weather data for Koseyri Niger is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 37.4 | 38.8 | 41.1 | 44.5 | 43.3 | 40.7 | 38.6 | 38.9 | 40.4 | 40.1 | 38.4 | 35.8 |
| Average daytime temperature (°C) | 30.3 | 32.2 | 37.3 | 39.9 | 41.1 | 36.2 | 36.5 | 33.6 | 36.6 | 37.6 | 35.7 | 30.4 |
| Average temperature (°C) | 22.5 | 24.4 | 30.0 | 32.9 | 34.8 | 31.0 | 31.5 | 29.0 | 30.9 | 31.3 | 29.0 | 22.8 |
| Average night temperature (°C) | 15.8 | 17.7 | 23.2 | 26.1 | 28.5 | 26.8 | 27.0 | 25.2 | 26.0 | 25.3 | 23.0 | 16.5 |
| Absolute minimum temperature (°C) | 12.9 | 14.4 | 18.7 | 22.4 | 25.3 | 24.4 | 24.6 | 23.1 | 23.8 | 21.7 | 18.1 | 13.2 |
| 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) | 11.4 | 11.7 | 12.1 | 12.4 | 12.8 | 12.9 | 12.8 | 12.6 | 12.2 | 11.8 | 11.5 | 11.3 |
| 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) | 10.3 | 10.8 | 10.2 | 10.4 | 11.0 | 9.7 | 10.2 | 9.1 | 9.8 | 10.2 | 9.8 | 10.0 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 38 | 28 | 97 | 39 | 8 | 0 | 0 |
| Sunny days | 31 | 28 | 30 | 30 | 30 | 17 | 17 | 10 | 19 | 29 | 30 | 31 |
| Rainy days | 0 | 0 | 1 | 0 | 1 | 13 | 14 | 21 | 11 | 2 | 0 | 0 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Koseyri is at