Isernia Weather & Climate: Best Time to Visit

The climate in Isernia is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 27°C (81°F) in August to a chilly 8°C (46°F) in the coolest month, January.

Nights vary from 16°C (61°F) in August to around 0°C (32°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Isernia has a notably wet climate with abundant precipitation, recording 1097 mm (43 in) of rain/snowfall per year. The climate in Isernia shows significant variation throughout the year. Expect high rainfall in November, the wettest month, with an average of 138 mm (5.4 in) of precipitation over 13 rainy days.

In contrast, the driest month August offers drier and sunnier days, with around 42 mm (1.7 in) of rainfall over 7 rainy days. For more details, please visit our Isernia Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Isernia serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.2 hours of sunshine daily, and embrace the darker days in February, offering only 3.4 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Isernia.

The city experiences its highest humidity in November, reaching 79%. In July, the humidity drops to its lowest level at 57%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year