September weather forecastNarni, Italy
September
Weather in September
The first month of the autumn, September, is still a warm month in Narni, Italy, with an average temperature fluctuating between 24.7°C (76.5°F) and 12.9°C (55.2°F).Temperature
Narni's September weather comes with a decrease in average high-temperatures, moving from a tropical 30.8°C (87.4°F) in August to a warm 24.7°C (76.5°F). Throughout the month of September, Narni observes an average nighttime temperature of 12.9°C (55.2°F).Humidity
In September, the average relative humidity is 69%.Rainfall
In Narni, during September, the rain falls for 10.7 days and regularly aggregates up to 30mm (1.18") of precipitation. Throughout the year, there are 137.2 rainfall days, and 415mm (16.34") of precipitation is accumulated.Snowfall
January, March through October are months without snowfall.Daylight
The average length of the day in September in Narni is 12h and 29min.On the first day of September, sunrise is at 06:35 and sunset at 19:44. On the last day of the month, sunrise is at 07:06 and sunset at 18:53 CEST.
Sunshine
The average sunshine in September is 10.8h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Narni, Italy
- Average high temperature in September: 24.7°C
The warmest month (with the highest average high temperature) is August (30.8°C).
The month with the lowest average high temperature is January (8.8°C).
- Average low temperature in September: 12.9°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is January (1.3°C).
Average pressure in September
Narni, Italy
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is July (1013.8mbar).
Average wind speed in September
Narni, Italy
- Average wind speed in September: 7.8km/h
The windiest month (with the highest average wind speed) is February (10.7km/h).
The calmest months (with the lowest average wind speed) are July and August (7.1km/h).
Average humidity in September
Narni, Italy
- Average humidity in September: 69%
The month with the highest relative humidity is November (81%).
The month with the lowest relative humidity is August (59%).
Average rainfall in September
Narni, Italy
- Average rainfall in September: 30mm
The wettest month (with the highest rainfall) is November (55mm).
The driest month (with the least rainfall) is August (19mm).
Average rainfall days in September
Narni, Italy
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is August (7.8 days).
Average snowfall in September
Narni, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is February (22mm).
The months with the least snowfall are January, March, April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Narni, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Narni, Italy
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 48min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in September
Narni, Italy
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is August (20.9 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in September
Narni, Italy
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Narni, Italy
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in September
Narni, Italy
- Average visibility in September: 9km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (9km).
