Isernia Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Isernia.
Climate overview of Isernia
Temperatures in Isernia, Molise, Italy, vary greatly throughout the year. August is the hottest month at 27°C (81°F), while January is the coldest at 8°C (46°F).
The city receives considerable rain/snowfall, with around 1097 mm (43 in) annually. November is the wettest month. It has warm summers and cold winters. July is the sunniest month, averaging 9.2 hours of sunshine per day.
Isernia Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Isernia - and find the best time to visit.
Monthly Temperature in Isernia
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
Rainfall in Isernia
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
Sunshine Hours in Isernia
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
Humidity in Isernia by Month
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
Best Time to Visit Isernia
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July and August
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around 0°C (32°F).
Frequently asked questions about the climate in Isernia
What is the best time to visit Isernia?
May, June, July, August and September typically offer the most optimal weather in Isernia. In contrast, January, February, March, November and December tend to have less optimal conditions. Isernia has warm summers and cold winters.
What temperatures can I expect in Isernia?
Daytime highs range from 8°C (46°F) in January to 27°C (81°F) in August. Nighttime lows range from 0°C (32°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Isernia get?
Annual rainfall is around 1097 mm (43 in). November is the wettest month with 138 mm (5.4 in), while August is the driest with 42 mm (1.7 in).
How sunny is Isernia?
Isernia receives around 2,134 hours of sunshine per year. July is the sunniest month with 277 hours, while February is the cloudiest with just 101 hours. Overall, Isernia enjoys abundant sunshine.
Isernia 3-Day Forecast
Isernia on the map
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