Average annual temperature is 13.8 °C
Absolute maximum temperature: 38.0 °C
Absolute minimum temperature: -4.3 °C
Number of sunny days: 165 days
Number of rainy days: 198 days
Number of snow days: 2 days
Look at detailed online map of Isernia
* Weather data for Isernia Italy is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 15.1 | 16.7 | 18.1 | 20.2 | 24.0 | 33.3 | 38.0 | 35.9 | 31.6 | 28.8 | 17.6 | 16.9 |
| Average daytime temperature (°C) | 10.0 | 11.1 | 13.8 | 14.9 | 19.1 | 24.9 | 31.4 | 29.3 | 26.6 | 23.0 | 14.2 | 11.9 |
| Average temperature (°C) | 5.1 | 5.4 | 8.8 | 9.9 | 14.9 | 19.4 | 24.5 | 22.3 | 20.2 | 17.0 | 10.3 | 7.5 |
| Average night temperature (°C) | 0.8 | 0.6 | 3.9 | 4.8 | 10.4 | 13.2 | 17.1 | 15.5 | 14.2 | 11.6 | 6.1 | 3.7 |
| Absolute minimum temperature (°C) | -3.8 | -3.1 | -1.5 | -2.1 | 5.5 | 9.0 | 13.0 | 10.6 | 10.2 | 8.6 | -4.3 | -1.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.2 | 8.4 | 8.3 | 9.5 | 8.5 | 12.2 | 13.7 | 12.0 | 10.5 | 8.9 | 5.9 | 6.8 |
| Precipitation (mm) | 168 | 45 | 82 | 81 | 236 | 60 | 10 | 54 | 67 | 154 | 213 | 38 |
| Sunny days | 15 | 18 | 13 | 8 | 6 | 12 | 23 | 16 | 21 | 14 | 6 | 13 |
| Rainy days | 16 | 8 | 18 | 22 | 25 | 18 | 8 | 15 | 9 | 17 | 24 | 18 |
| Snow days | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Isernia during the most sunny months:
The largest precipitation sum in Isernia is at