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
The start of September signals a gentle decrease in the average high-temperature, transitioning from a refreshing 15.6°C (60.1°F) in August to a fresh 11.2°C (52.2°F). The average low-temperature of 2.8°C (37°F) is witnessed in Grosio during September.Humidity
In September, the average relative humidity in Grosio is 84%.Rainfall
In September, in Grosio, the rain falls for 20.7 days. Throughout September, 94mm (3.7") of precipitation is accumulated. In Grosio, during the entire year, the rain falls for 199 days and collects up to 1288mm (50.71") of precipitation.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.8 snowfall days, it receives 39mm (1.54") of snow. Throughout the year, there are 106.9 snowfall days, and 3343mm (131.61") 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 06:39 and sunset at 19:57. On the last day of September, in Grosio, sunrise is at 07:16 and sunset at 19:00 CEST.
Sunshine
The average sunshine in September in Grosio is 8.2h.UV index
June through September, with an average maximum UV index of 3, are months with the highest UV index in Grosio. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 3 translates into these guidelines:
Put precautions into practice - Protective measures against sun-induced damage are advised. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Grosio?
What is the average humidity in September in Grosio?
How much does it rain in Grosio in September?
When does it start to snow in Grosio?
How many hours of daylight does Grosio have in September?
When is the sunrise / sunset in September in Grosio?
How long on average sun shines in September in Grosio?
When is the highest UV index in Grosio?
What is the UV index intensity in September in Grosio?
Average temperature in September
Grosio, Italy
- Average high temperature in September: 11.2°C
The warmest month (with the highest average high temperature) is July (15.8°C).
The month with the lowest average high temperature is January (-4.2°C).
- Average low temperature in September: 2.8°C
The month with the highest average low temperature is August (5.9°C).
The coldest month (with the lowest average low temperature) is January (-12.5°C).
Average pressure in September
Grosio, 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
Grosio, Italy
- Average wind speed in September: 6.8km/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 (6.5km/h).
Average humidity in September
Grosio, Italy
- Average humidity in September: 84%
The month with the highest relative humidity is April (92%).
The month with the lowest relative humidity is July (81%).
Average rainfall in September
Grosio, Italy
- Average rainfall in September: 94mm
The wettest month (with the highest rainfall) is August (159mm).
The driest month (with the least rainfall) is January (54mm).
Average rainfall days in September
Grosio, Italy
- Average rainfall days in September: 20.7 days
The months with the highest number of rainy days are June and July (26.4 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in September
Grosio, Italy
- Average snowfall in September: 39mm
The month with the highest snowfall is November (750mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Grosio, Italy
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is March (19.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Grosio, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is November (Average sunshine: 4h and 24min).
Average sunshine days in September
Grosio, Italy
- Average sunshine days in September: 6.7 days
The month with the most sunshine days is December (13.5 days).
The month with the least sunshine days is June (2.3 days).
Average UV index in September
Grosio, Italy
- Average UV index in September: 3
The months with the highest UV index are June, July, August and September (UV index 3).
The months with the lowest UV index are January, February, April, October and November (UV index 1).
Average cloud cover in September
Grosio, Italy
- Average cloud cover in September: 48
The month with the most cloud cover is April (Cloud cover 59).
The month with the least cloud cover is July (Cloud cover 41).
Average visibility in September
Grosio, 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 March, April and November (6km).
