September weather forecastGrône, Switzerland
September
Weather in September
September, the first month of the autumn in Grône, is still a cool month, with temperature in the range of an average low of 3.3°C (37.9°F) and an average high of 12.3°C (54.1°F).Temperature
September brings a slight decrease in the average high-temperature, shifting from a comfortable 16.7°C (62.1°F) in August to a cool 12.3°C (54.1°F). During the month of September, the temperature generally drops to a low average of 3.3°C (37.9°F).Humidity
In Grône, Switzerland, the average relative humidity in September is 82%.Rainfall
September is the month with the least rainfall. Rain falls for 20.2 days and accumulates 76mm (2.99") of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Grône. Throughout September, in the average 0.1 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, in Grône, there are 40.9 snowfall days, and 716mm (28.19") of snow is accumulated.Daylight
The average length of the day in September in Grône is 12h and 32min.On the first day of the month, sunrise is at 06:51 and sunset at 20:08. On the last day of September, sunrise is at 07:27 and sunset at 19:11 CEST.
Sunshine
In Grône, the average sunshine in September is 8.3h.UV index
In September, the average daily maximum UV index in Grône is 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: During September, 2 as the daily maximum UV index converts into the following advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grône, Switzerland
- Average high temperature in September: 12.3°C
The warmest month (with the highest average high temperature) is August (16.7°C).
The month with the lowest average high temperature is January (-2.5°C).
- Average low temperature in September: 3.3°C
The month with the highest average low temperature is August (6.4°C).
The coldest months (with the lowest average low temperature) are January and February (-11°C).
Average pressure in September
Grône, Switzerland
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1020.9mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Grône, Switzerland
- Average wind speed in September: 6.5km/h
The windiest month (with the highest average wind speed) is December (8.3km/h).
The calmest month (with the lowest average wind speed) is August (6.2km/h).
Average humidity in September
Grône, Switzerland
- Average humidity in September: 82%
The month with the highest relative humidity is March (90%).
The months with the lowest relative humidity are July and August (79%).
Average rainfall in September
Grône, Switzerland
- Average rainfall in September: 76mm
The wettest month (with the highest rainfall) is May (177mm).
The driest month (with the least rainfall) is September (76mm).
Average rainfall days in September
Grône, Switzerland
- Average rainfall days in September: 20.2 days
The month with the highest number of rainy days is May (25.8 days).
The month with the least rainy days is February (13.8 days).
Average snowfall in September
Grône, Switzerland
- Average snowfall in September: 1mm
The month with the highest snowfall is February (167mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Grône, Switzerland
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (10.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Grône, Switzerland
- 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: 8h and 18min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Grône, Switzerland
- Average sunshine days in September: 7.6 days
The month with the most sunshine days is October (13.5 days).
The month with the least sunshine days is June (2.8 days).
Average UV index in September
Grône, Switzerland
- 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 and November (UV index 1).
Average cloud cover in September
Grône, Switzerland
- Average cloud cover in September: 41
The months with the most cloud cover are February and March (Cloud cover 53).
The month with the least cloud cover is October (Cloud cover 37).
Average visibility in September
Grône, Switzerland
- Average visibility in September: 7km
The months with the highest visibility are June, July, August, October and November (8km).
The months with the lowest visibility are January, February and March (6km).
