Average annual temperature is 13.1 °C
Absolute maximum temperature: 34.2 °C
Absolute minimum temperature: -5.2 °C
Number of sunny days: 143 days
Number of rainy days: 221 days
Number of snow days: 1 day
Look at detailed online map of Saint-Germain-lès-Arpajon
* Weather data for Saint-Germain-lès-Arpajon 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) | 15.9 | 14.5 | 19.5 | 20.8 | 25.7 | 31.2 | 32.5 | 31.6 | 34.2 | 27.5 | 17.0 | 14.3 |
| Average daytime temperature (°C) | 8.1 | 9.7 | 12.3 | 14.1 | 19.4 | 26.8 | 25.1 | 24.0 | 25.3 | 19.1 | 11.8 | 9.7 |
| Average temperature (°C) | 5.8 | 5.6 | 8.7 | 9.9 | 14.8 | 21.2 | 20.5 | 19.7 | 19.9 | 14.5 | 9.0 | 7.4 |
| Average night temperature (°C) | 3.3 | 2.0 | 5.0 | 5.6 | 10.0 | 15.3 | 15.4 | 15.5 | 14.6 | 10.5 | 6.2 | 5.2 |
| Absolute minimum temperature (°C) | -2.6 | -5.2 | -2.2 | -1.0 | 6.0 | 10.1 | 11.0 | 11.4 | 6.6 | 4.5 | -0.4 | -2.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.8 | 10.2 | 11.9 | 13.7 | 15.2 | 16.1 | 15.7 | 14.3 | 12.6 | 10.8 | 9.2 | 8.4 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 2.6 | 5.2 | 6.1 | 7.9 | 11.3 | 12.6 | 11.0 | 9.8 | 9.4 | 6.7 | 4.5 | 2.2 |
| Precipitation (mm) | 57 | 12 | 93 | 77 | 79 | 61 | 86 | 122 | 83 | 91 | 90 | 68 |
| Sunny days | 10 | 19 | 7 | 10 | 16 | 19 | 14 | 6 | 16 | 12 | 4 | 10 |
| Rainy days | 20 | 9 | 24 | 20 | 15 | 11 | 17 | 25 | 14 | 19 | 26 | 21 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Saint-Germain-lès-Arpajon during the most sunny months:
Months with the longest average daylight duration in Saint-Germain-lès-Arpajon:
The largest precipitation sum in Saint-Germain-lès-Arpajon is at