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 witnesses a gentle descent in average high-temperature, descending from August's refreshing 15.4°C (59.7°F) to a cool 11.3°C (52.3°F). In Griesalp, in September, the average low-temperature is an icy 2.6°C (36.7°F).Humidity
In Griesalp, the average relative humidity in September is 85%.Rainfall
In Griesalp, Switzerland, in September, during 16.9 rainfall days, 54mm (2.13") of precipitation is typically accumulated. In Griesalp, Switzerland, during the entire year, the rain falls for 153.6 days and collects up to 908mm (35.75") of precipitation.Snowfall
Months with snowfall in Griesalp are January through December. In Griesalp, Switzerland, during September, snow falls for 3.7 days and regularly aggregates up to 75mm (2.95") of snow. In Griesalp, during the entire year, snow falls for 145.6 days and aggregates up to 3282mm (129.21") of snow.Daylight
The average length of the day in September is 12h and 33min.On the first day of September in Griesalp, sunrise is at 06:49 and sunset at 20:07. On the last day of the month, sunrise is at 07:26 and sunset at 19:10 CEST.
Sunshine
In September, the average sunshine in Griesalp, Switzerland, is 7.5h.UV index
In Griesalp, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 2 suggests this advice:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Griesalp?
What is the average humidity in September in Griesalp?
How much does it rain in Griesalp in September?
How much does it snow in Griesalp in September?
What is the average length of the day in September in Griesalp?
What time are sunrise and sunset in September in Griesalp?
How long on average sun shines in September in Griesalp?
How high is the UV index in September in Griesalp?
Average temperature in September
Griesalp, Switzerland
- Average high temperature in September: 11.3°C
The warmest month (with the highest average high temperature) is August (15.4°C).
The month with the lowest average high temperature is January (-3.1°C).
- Average low temperature in September: 2.6°C
The months with the highest average low temperature are July and August (5.7°C).
The coldest months (with the lowest average low temperature) are January and February (-11.9°C).
Average pressure in September
Griesalp, Switzerland
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1021mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Griesalp, Switzerland
- Average wind speed in September: 6.4km/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 (6km/h).
Average humidity in September
Griesalp, Switzerland
- Average humidity in September: 85%
The month with the highest relative humidity is March (92%).
The month with the lowest relative humidity is August (82%).
Average rainfall in September
Griesalp, Switzerland
- Average rainfall in September: 54mm
The wettest month (with the highest rainfall) is June (116mm).
The driest month (with the least rainfall) is February (43mm).
Average rainfall days in September
Griesalp, Switzerland
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is July (24 days).
The months with the least rainy days are February and December (4 days).
Average snowfall in September
Griesalp, Switzerland
- Average snowfall in September: 75mm
The month with the highest snowfall is December (506mm).
The month with the least snowfall is July (8mm).
Average snowfall days in September
Griesalp, Switzerland
- Average snowfall days in September: 3.7 days
The month with the highest number of snowfall days is March (21.2 days).
The month with the least snowfall days is July (0.8 days).
Average daylight in September /
Average sunshine in September
Griesalp, Switzerland
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 7h and 3min
The months with the most sunshine are July and August (Average sunshine: 8h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in September
Griesalp, Switzerland
- Average sunshine days in September: 8.4 days
The month with the most sunshine days is October (14 days).
The month with the least sunshine days is July (3.6 days).
Average UV index in September
Griesalp, Switzerland
- Average UV index in September: 2
The month with the highest UV index is June (UV index 4).
The months with the lowest UV index are January, March, April and November (UV index 1).
Average cloud cover in September
Griesalp, Switzerland
- Average cloud cover in September: 50
The month with the most cloud cover is February (Cloud cover 62).
The months with the least cloud cover are August and October (Cloud cover 46).
Average visibility in September
Griesalp, Switzerland
- Average visibility in September: 7km
The months with the highest visibility are June, July, August, September, October, November and December (7km).
The months with the lowest visibility are January, February, March, April and May (6km).
