Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
Sondrio's progression into September involves a gentle drop in the average high-temperature, from a refreshing 16.3°C (61.3°F) in August to a fresh 12.2°C (54°F). During September, the average low-temperature in Sondrio, Italy, is a cold 3.5°C (38.3°F).Humidity
The average relative humidity in September is 84%.Rainfall
In September, in Sondrio, the rain falls for 16.6 days. Throughout September, 77mm (3.03") of precipitation is accumulated. Throughout the year, there are 141.8 rainfall days, and 1016mm (40") of precipitation is accumulated.Snowfall
January through December are months with snowfall. In September, in Sondrio, it is snowing for 1.6 days. Throughout September, 105mm (4.13") of snow is accumulated. Throughout the year, there are 98.9 snowfall days, and 3454mm (135.98") of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 06:41 and sunset at 19:59. On the last day of September, sunrise is at 07:18 and sunset at 19:02 CEST.
Sunshine
In Sondrio, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Sondrio, Italy, is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a regular UV index of 3 translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Sondrio?
What is the average humidity in September in Sondrio?
How many days does it rain in September in Sondrio?
How much does it snow in Sondrio in September?
What is the average length of the day in September in Sondrio?
What time are sunrise and sunset in September in Sondrio?
How many hours of sunshine does Sondrio have in September?
What is the UV index reading in September in Sondrio?
Average temperature in September
Sondrio, Italy
- Average high temperature in September: 12.2°C
The warmest month (with the highest average high temperature) is July (16.6°C).
The month with the lowest average high temperature is January (-2.8°C).
- Average low temperature in September: 3.5°C
The month with the highest average low temperature is August (6.7°C).
The coldest month (with the lowest average low temperature) is January (-10.8°C).
Average pressure in September
Sondrio, Italy
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is December (1020.5mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Sondrio, Italy
- Average wind speed in September: 6.8km/h
The windiest month (with the highest average wind speed) is December (8.8km/h).
The calmest month (with the lowest average wind speed) is August (6.6km/h).
Average humidity in September
Sondrio, Italy
- Average humidity in September: 84%
The months with the highest relative humidity are March and April (89%).
The month with the lowest relative humidity is July (81%).
Average rainfall in September
Sondrio, Italy
- Average rainfall in September: 77mm
The wettest month (with the highest rainfall) is August (149mm).
The driest month (with the least rainfall) is January (32mm).
Average rainfall days in September
Sondrio, Italy
- Average rainfall days in September: 16.6 days
The month with the highest number of rainy days is July (25.8 days).
The month with the least rainy days is December (2.4 days).
Average snowfall in September
Sondrio, Italy
- Average snowfall in September: 105mm
The month with the highest snowfall is November (902mm).
The month with the least snowfall is August (1mm).
Average snowfall days in September
Sondrio, Italy
- Average snowfall days in September: 1.6 days
The month with the highest number of snowfall days is March (16 days).
The month with the least snowfall days is August (0.1 days).
Average daylight in September /
Average sunshine in September
Sondrio, Italy
- Average daylight in September: 12h and 3min
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: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is November (Average sunshine: 4h and 42min).
Average sunshine days in September
Sondrio, Italy
- Average sunshine days in September: 11.1 days
The month with the most sunshine days is January (18.1 days).
The month with the least sunshine days is July (3.2 days).
Average UV index in September
Sondrio, Italy
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are February, April and October (UV index 1).
Average cloud cover in September
Sondrio, Italy
- Average cloud cover in September: 45
The month with the most cloud cover is April (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Sondrio, Italy
- Average visibility in September: 7km
The months with the highest visibility are June, July, August and December (8km).
The months with the lowest visibility are April and November (6km).
