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
September brings a minor decrease, with the average high-temperature reducing from a warm 25.5°C (77.9°F) in August to an agreeable 20°C (68°F). Alvi encounters an average low-temperature of 9.5°C (49.1°F) during September nights.Humidity
In September, the average relative humidity in Alvi is 76%.Rainfall
In Alvi, in September, it is raining for 17.4 days, with typically 69mm (2.72") of accumulated precipitation. Throughout the year, there are 211.4 rainfall days, and 1009mm (39.72") of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 06:31 and sunset at 19:40. On the last day of September, sunrise is at 07:02 and sunset at 18:49 CEST.
Sunshine
The average sunshine in September is 10.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: A maximum UV index of 4 in September translates into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September in Alvi?
How many hours of sunshine does Alvi have in September?
What is the UV index reading in September?
Average temperature in September
Alvi, Italy
- Average high temperature in September: 20°C
The warmest month (with the highest average high temperature) is August (25.5°C).
The month with the lowest average high temperature is January (5°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (12.7°C).
The coldest month (with the lowest average low temperature) is January (-1.6°C).
Average pressure in September
Alvi, Italy
- Average pressure in September: 1015.5mbar
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
Alvi, Italy
- Average wind speed in September: 5.9km/h
The windiest month (with the highest average wind speed) is February (8.5km/h).
The calmest month (with the lowest average wind speed) is August (5km/h).
Average humidity in September
Alvi, Italy
- Average humidity in September: 76%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Alvi, Italy
- Average rainfall in September: 69mm
The wettest month (with the highest rainfall) is May (127mm).
The driest month (with the least rainfall) is October (57mm).
Average rainfall days in September
Alvi, Italy
- Average rainfall days in September: 17.4 days
The month with the highest number of rainy days is May (23.4 days).
The month with the least rainy days is December (13.2 days).
Average snowfall in September
Alvi, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is January (262mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Alvi, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Alvi, Italy
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Alvi, Italy
- Average sunshine days in September: 10 days
The month with the most sunshine days is December (12.8 days).
The month with the least sunshine days is May (5.8 days).
Average UV index in September
Alvi, Italy
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Alvi, Italy
- Average cloud cover in September: 30
The months with the most cloud cover are January and February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Alvi, Italy
- Average visibility in September: 9km
The months with the highest visibility are June, July, August and September (9km).
The month with the lowest visibility is January (7km).
