September weather forecastCastronno, Italy
September
Weather in September
September, the first month of the autumn in Castronno, is still a pleasant month, with an average temperature varying between 21.5°C (70.7°F) and 12.2°C (54°F).Temperature
In September, the meteorological conditions change slightly, with the average high-temperature moving from a moderately hot 26.1°C (79°F) in August to a pleasant 21.5°C (70.7°F). Castronno usually reports an average low-temperature of 12.2°C (54°F) during the month of September.Humidity
In September, the average relative humidity in Castronno is 74%.Rainfall
In Castronno, in September, during 14.4 rainfall days, 54mm (2.13") of precipitation is typically accumulated. Throughout the year, in Castronno, there are 178.3 rainfall days, and 1124mm (44.25") of precipitation is accumulated.Snowfall
In Castronno, Italy, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 06:46 and sunset at 20:02. On the last day of September, sunrise is at 07:22 and sunset at 19:06 CEST.
Sunshine
The average sunshine in September in Castronno is 9.8h.UV index
The average daily maximum UV index in September in Castronno is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In September, an average UV index of 4 transforms into the following instructions:
Be vigilant - A duty to shield skin and eyes from injury exists. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Castronno, Italy
- Average high temperature in September: 21.5°C
The warmest month (with the highest average high temperature) is July (26.4°C).
The month with the lowest average high temperature is January (4.9°C).
- Average low temperature in September: 12.2°C
The month with the highest average low temperature is August (15.7°C).
The coldest month (with the lowest average low temperature) is January (-0.5°C).
Average pressure in September
Castronno, Italy
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is December (1020.3mbar).
The month with the lowest atmospheric pressure is April (1014.8mbar).
Average wind speed in September
Castronno, Italy
- Average wind speed in September: 5.9km/h
The windiest month (with the highest average wind speed) is March (6.7km/h).
The calmest month (with the lowest average wind speed) is November (5.4km/h).
Average humidity in September
Castronno, Italy
- Average humidity in September: 74%
The month with the highest relative humidity is November (79%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Castronno, Italy
- Average rainfall in September: 54mm
The wettest month (with the highest rainfall) is November (179mm).
The driest month (with the least rainfall) is January (33mm).
Average rainfall days in September
Castronno, Italy
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is May (21 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in September
Castronno, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is February (69mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Castronno, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Castronno, Italy
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is November (Average sunshine: 5h and 18min).
Average sunshine days in September
Castronno, Italy
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is May (6.2 days).
Average UV index in September
Castronno, Italy
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Castronno, Italy
- Average cloud cover in September: 26
The month with the most cloud cover is November (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 21).
Average visibility in September
Castronno, Italy
- Average visibility in September: 9km
The month with the highest visibility is July (10km).
The months with the lowest visibility are January, February, March, April, May, June, August, September, October, November and December (9km).
