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
With the arrival of September, Grellingen experiences a modest decline in average high-temperatures, transitioning from a warm 24.1°C (75.4°F) in August to a refreshing 19.7°C (67.5°F). During the month of September, the temperature in Grellingen falls to an average of 9.4°C (48.9°F).Humidity
In Grellingen, the average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 33mm (1.3") of precipitation.Snowfall
April through September are months without snowfall.Daylight
In Grellingen, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 06:49 and sunset at 20:09. On the last day of September, sunrise is at 07:27 and sunset at 19:10 CEST.
Sunshine
In September, the average sunshine in Grellingen is 8.7h.UV index
In Grellingen, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Act with care - The suggestion to avoid sunburn is emphasized. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
What is the average September temperature in Grellingen?
What is the average humidity in September in Grellingen?
What is the driest month in Grellingen?
How much does it rain in Grellingen in September?
When it does not snow in Grellingen?
Does it snow in Grellingen in September?
How many hours of daylight does Grellingen have in September?
When are sunrise and sunset in September in Grellingen?
How long on average sun shines in September in Grellingen?
What is the UV index intensity in September in Grellingen?
Average temperature in September
Grellingen, Switzerland
- Average high temperature in September: 19.7°C
The warmest month (with the highest average high temperature) is August (24.1°C).
The month with the lowest average high temperature is January (3.5°C).
- Average low temperature in September: 9.4°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (-1.8°C).
Average pressure in September
Grellingen, Switzerland
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The months with the lowest atmospheric pressure are April and November (1015.7mbar).
Average wind speed in September
Grellingen, Switzerland
- Average wind speed in September: 7.1km/h
The windiest months (with the highest average wind speed) are February and March (9.9km/h).
The calmest month (with the lowest average wind speed) is August (6.7km/h).
Average humidity in September
Grellingen, Switzerland
- Average humidity in September: 80%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in September
Grellingen, Switzerland
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is June (84mm).
The driest month (with the least rainfall) is September (33mm).
Average rainfall days in September
Grellingen, Switzerland
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (20.3 days).
The month with the least rainy days is October (11.5 days).
Average snowfall in September
Grellingen, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (61mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Grellingen, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grellingen, Switzerland
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Grellingen, Switzerland
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (16.8 days).
The months with the least sunshine days are May and June (8.3 days).
Average UV index in September
Grellingen, Switzerland
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Grellingen, Switzerland
- Average cloud cover in September: 35
The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Grellingen, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are March, April, May, June, July and August (9km).
The months with the lowest visibility are January, February, September, October, November and December (8km).
Grellingen, Switzerland
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