September weather forecastAcerno, Italy
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Acerno, Italy, with an average temperature ranging between max 25.5°C (77.9°F) and min 16.8°C (62.2°F).Temperature
A minor decrease in the average high-temperature is observed during September, shifting from a hot 30.3°C (86.5°F) in August to a warm 25.5°C (77.9°F). During September, the nighttime temperature averages of 16.8°C (62.2°F).Humidity
In September, the average relative humidity in Acerno is 67%.Rainfall
In Acerno, in September, it is raining for 11.8 days, with typically 38mm (1.5") of accumulated precipitation. Throughout the year, there are 140.4 rainfall days, and 513mm (20.2") of precipitation is accumulated.Snowfall
In Acerno, snow does not fall in March through November.Daylight
The average length of the day in September in Acerno is 12h and 28min.On the first day of September, sunrise is at 06:27 and sunset at 19:31. On the last day of the month, sunrise is at 06:55 and sunset at 18:43 CEST.
Sunshine
The average sunshine in September is 10.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Heed the precautions - Suggestions to avoid sunburn are made. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Acerno, Italy
- Average high temperature in September: 25.5°C
The warmest month (with the highest average high temperature) is August (30.3°C).
The month with the lowest average high temperature is January (11°C).
- Average low temperature in September: 16.8°C
The month with the highest average low temperature is August (19.4°C).
The coldest months (with the lowest average low temperature) are January and February (5.3°C).
Average pressure in September
Acerno, Italy
- Average pressure in September: 1015.4mbar
The month with the highest atmospheric pressure is December (1018.3mbar).
The month with the lowest atmospheric pressure is July (1013.8mbar).
Average wind speed in September
Acerno, Italy
- Average wind speed in September: 8.7km/h
The windiest month (with the highest average wind speed) is February (12.2km/h).
The calmest month (with the lowest average wind speed) is August (7.4km/h).
Average humidity in September
Acerno, Italy
- Average humidity in September: 67%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (61%).
Average rainfall in September
Acerno, Italy
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is November (99mm).
The driest month (with the least rainfall) is August (10mm).
Average rainfall days in September
Acerno, Italy
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is January (14.9 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in September
Acerno, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is January (6mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Acerno, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.7 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Acerno, Italy
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 42min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The months with the least sunshine are January and February (Average sunshine: 5h and 48min).
Average sunshine days in September
Acerno, Italy
- Average sunshine days in September: 15.3 days
The months with the most sunshine days are July and August (22.4 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in September
Acerno, Italy
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Acerno, Italy
- Average cloud cover in September: 20
The months with the most cloud cover are January and February (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Acerno, Italy
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
