Average annual temperature is 12.8 °C
Absolute maximum temperature: 33.8 °C
Absolute minimum temperature: -4.4 °C
Number of sunny days: 127 days
Number of rainy days: 237 days
Number of snow days: 1 day
Look at detailed online map of L'Isle-Adam
* Weather data for L'Isle-Adam 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) | 15.2 | 15.0 | 19.1 | 20.3 | 24.7 | 31.1 | 31.4 | 30.7 | 33.8 | 27.5 | 16.9 | 13.8 |
| Average daytime temperature (°C) | 8.2 | 9.4 | 12.0 | 13.7 | 18.8 | 25.7 | 24.1 | 23.7 | 24.9 | 18.8 | 11.5 | 9.7 |
| Average temperature (°C) | 5.9 | 5.6 | 8.6 | 9.6 | 14.2 | 20.5 | 19.6 | 19.3 | 19.6 | 14.3 | 8.8 | 7.4 |
| Average night temperature (°C) | 3.3 | 2.2 | 5.0 | 5.4 | 9.5 | 14.8 | 14.7 | 14.9 | 14.6 | 10.2 | 6.2 | 5.1 |
| Absolute minimum temperature (°C) | -3.3 | -4.4 | -2.1 | -1.1 | 6.0 | 9.3 | 10.4 | 10.6 | 7.1 | 4.1 | -1.0 | -3.7 |
| 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 | 15.3 | 16.1 | 15.7 | 14.4 | 12.6 | 10.8 | 9.2 | 8.3 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.0 | 5.0 | 6.2 | 8.0 | 11.0 | 12.9 | 11.2 | 10.1 | 9.4 | 6.7 | 4.2 | 2.4 |
| Precipitation (mm) | 76 | 8 | 103 | 67 | 51 | 56 | 81 | 107 | 86 | 110 | 114 | 73 |
| Sunny days | 8 | 18 | 5 | 10 | 16 | 17 | 8 | 5 | 17 | 13 | 3 | 7 |
| Rainy days | 23 | 10 | 26 | 20 | 15 | 13 | 23 | 26 | 13 | 18 | 27 | 23 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit L'Isle-Adam during the most sunny months:
Months with the longest average daylight duration in L'Isle-Adam:
The largest precipitation sum in L'Isle-Adam is at