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
Weather in September
Temperature
The start of September involves a subtle temperature drop, shifting from an enjoyable 16.3°C (61.3°F) in August to a cool 12°C (53.6°F). An average nighttime temperature of 3.4°C (38.1°F) is noted in Aosta during the month of September.Humidity
In September, the average relative humidity is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 19.8 days and typically collects 77mm (3.03") of precipitation.Snowfall
In Aosta, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 06:52 and sunset at 20:08. On the last day of September, sunrise is at 07:28 and sunset at 19:12 CEST.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 2 suggests this advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
What are the temperatures in Aosta in September?
What is the average humidity in September in Aosta?
What is the driest month in Aosta?
How many days does it rain in September in Aosta?
When it does not snow in Aosta?
Does it snow in Aosta in September?
What is the average length of the day in September in Aosta?
When is the sunrise / sunset in September in Aosta?
How many hours of sunshine does Aosta have in September?
What is the UV index reading in September in Aosta?
Average temperature in September
Aosta, Italy
- Average high temperature in September: 12°C
The warmest month (with the highest average high temperature) is July (16.5°C).
The month with the lowest average high temperature is January (-2.7°C).
- Average low temperature in September: 3.4°C
The months with the highest average low temperature are July and August (6.5°C).
The coldest months (with the lowest average low temperature) are January and February (-10.8°C).
Average pressure in September
Aosta, Italy
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The month with the lowest atmospheric pressure is April (1014.9mbar).
Average wind speed in September
Aosta, Italy
- Average wind speed in September: 6.1km/h
The windiest month (with the highest average wind speed) is December (9km/h).
The calmest month (with the lowest average wind speed) is August (5.6km/h).
Average humidity in September
Aosta, Italy
- Average humidity in September: 80%
The month with the highest relative humidity is March (87%).
The months with the lowest relative humidity are July and August (77%).
Average rainfall in September
Aosta, Italy
- Average rainfall in September: 77mm
The wettest month (with the highest rainfall) is May (181mm).
The driest month (with the least rainfall) is September (77mm).
Average rainfall days in September
Aosta, Italy
- Average rainfall days in September: 19.8 days
The month with the highest number of rainy days is May (27 days).
The month with the least rainy days is December (14.9 days).
Average snowfall in September
Aosta, Italy
- Average snowfall in September: 0mm
The month with the highest snowfall is February (175mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Aosta, Italy
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Aosta, 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 48min).
- 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: 5h and 12min).
Average sunshine days in September
Aosta, Italy
- Average sunshine days in September: 8.2 days
The month with the most sunshine days is October (11.7 days).
The month with the least sunshine days is May (2.7 days).
Average UV index in September
Aosta, Italy
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, March and April (UV index 1).
Average cloud cover in September
Aosta, Italy
- Average cloud cover in September: 40
The month with the most cloud cover is May (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Aosta, Italy
- Average visibility in September: 8km
The month with the highest visibility is July (9km).
The months with the lowest visibility are January, February, March, April and May (7km).
Aosta, Italy
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