Average annual temperature is 12.5 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: -5.8 °C
Number of sunny days: 164 days
Number of rainy days: 199 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) | 14.0 | 15.2 | 16.7 | 17.8 | 21.0 | 31.7 | 36.4 | 34.1 | 30.1 | 27.2 | 16.1 | 14.6 |
| Average daytime temperature (°C) | 7.7 | 8.9 | 11.4 | 12.5 | 16.9 | 22.8 | 29.7 | 27.2 | 24.6 | 21.3 | 12.4 | 10.0 |
| Average temperature (°C) | 3.8 | 4.0 | 7.0 | 8.0 | 13.1 | 17.9 | 23.5 | 21.0 | 18.9 | 16.1 | 9.1 | 6.3 |
| Average night temperature (°C) | 0.4 | 0.0 | 3.1 | 4.0 | 9.4 | 12.9 | 17.4 | 15.4 | 14.0 | 11.7 | 5.7 | 3.2 |
| Absolute minimum temperature (°C) | -5.8 | -3.5 | -2.6 | -1.4 | 6.5 | 9.4 | 12.9 | 10.0 | 9.1 | 8.4 | -3.1 | -1.7 |
| 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) | 6.0 | 7.9 | 8.1 | 9.1 | 8.1 | 12.2 | 13.6 | 12.0 | 10.4 | 8.7 | 5.6 | 6.5 |
| Precipitation (mm) | 159 | 31 | 57 | 55 | 246 | 81 | 9 | 34 | 43 | 106 | 179 | 28 |
| Sunny days | 15 | 19 | 13 | 9 | 2 | 13 | 22 | 17 | 16 | 13 | 9 | 16 |
| Rainy days | 16 | 7 | 18 | 21 | 29 | 17 | 9 | 14 | 14 | 18 | 21 | 15 |
| 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