Average annual temperature is 10.9 °C
Absolute maximum temperature: 36.1 °C
Absolute minimum temperature: -11.2 °C
Number of sunny days: 156 days
Number of rainy days: 200 days
Number of snow days: 9 days
Look at detailed online map of Onnex
* Weather data for Onnex France is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 13.4 | 13.1 | 19.3 | 19.1 | 22.9 | 28.1 | 34.2 | 36.1 | 28.8 | 24.6 | 13.2 | 11.2 |
| Average daytime temperature (°C) | 4.4 | 8.0 | 10.4 | 11.9 | 17.0 | 23.9 | 25.6 | 26.4 | 23.2 | 17.7 | 7.8 | 6.6 |
| Average temperature (°C) | 1.6 | 2.9 | 5.9 | 7.5 | 12.7 | 18.8 | 20.2 | 20.9 | 18.1 | 13.0 | 5.1 | 3.3 |
| Average night temperature (°C) | -1.1 | -1.1 | 1.9 | 3.2 | 8.3 | 13.6 | 15.1 | 15.4 | 13.3 | 8.8 | 2.0 | 0.2 |
| Absolute minimum temperature (°C) | -11.2 | -5.0 | -3.8 | -2.6 | 5.1 | 10.3 | 10.1 | 7.9 | 6.1 | 4.5 | -4.8 | -6.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 |
| Daylight mean duration (h) | 9.1 | 10.4 | 11.9 | 13.6 | 14.9 | 15.7 | 15.3 | 14.1 | 12.5 | 10.9 | 9.5 | 8.7 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 4.5 | 8.3 | 7.2 | 8.2 | 10.4 | 12.9 | 12.6 | 10.9 | 10.2 | 7.8 | 3.8 | 3.9 |
| Precipitation (mm) | 102 | 10 | 165 | 132 | 77 | 77 | 101 | 94 | 92 | 215 | 240 | 199 |
| Sunny days | 15 | 21 | 11 | 10 | 10 | 8 | 11 | 17 | 17 | 16 | 6 | 14 |
| Rainy days | 12 | 5 | 19 | 20 | 21 | 22 | 20 | 14 | 13 | 15 | 23 | 16 |
| Snow days | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Onnex during the most sunny months:
Months with the longest average daylight duration in Onnex:
The largest precipitation sum in Onnex is at