ItalyThe weather in September in Isernia
It's warm in September in Isernia with an average temperature of 28°C. Temperatures this month range from a low of 25°C to a high of 30°C. At night, you can expect temperatures between 15°C and 20°C.
Looking for great weather? September is a good time to be in Isernia. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Isernia, Italy. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 34°C in 2015, Isernia reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 16°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 9°C to a highest value of 24°C.
Rainfall amount
In September, there is an average of 84 mm of precipitation, spread over 12 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in September for Isernia
Click on any day in September to get detailed info about the usual weather on that day in Isernia. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Isernia | New York | |
|---|---|---|
| Average temperature | 28°C | 27°C |
| Max. temperature | 30°C | 31°C |
| Min. temperature | 15°C | -5°C |
| Total precipitation | 84 mm | 57 mm |
| Rainy days | 12 days | 9 days |
Start of September
The month of September starts in Isernia with hot temps, averaging around 29°C during the day and nights around 20°C.
Mid September
By mid-September, daytime temps stay steady at around 29°C, with nights around 19°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Isernia is around 26°C, while nighttime temps are about 16°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Find affordable trips to Isernia
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Isernia for all months and discover the best travel time
Curious about the weather in other parts of Italy? Check out the climate and weather for spots like Tuscany, Sicily, Lake Garda, or explore other destinations in Italy.
Temperature charts
These charts show the average temperatures in September in Isernia, Italy. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Isernia
Temperature in September in Isernia over the years
Precipitation charts
These charts show the average amount of precipitation in September in Isernia, Italy. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Isernia
Total precipitation in September in Isernia over the years
Daily UV index in September in Isernia
This chart shows the average daily UV index in September in Isernia, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Isernia
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Average weather in Isernia by month
Click on a month below to see detailed weather info for Isernia. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.