September weather forecastGerra, Switzerland
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Gerra, Switzerland, with an average temperature ranging between min 7.2°C (45°F) and max 16.5°C (61.7°F).Temperature
September's arrival subtly correlates with a reduction in the average high-temperature, down from an agreeable 20.8°C (69.4°F) in August to a refreshing 16.5°C (61.7°F). During September nights, Gerra records an average temperature of 7.2°C (45°F).Humidity
In Gerra, the average relative humidity in September is 79%.Rainfall
In September, in Gerra, Switzerland, the rain falls for 17.6 days. Throughout September, 63mm (2.48") of precipitation is accumulated. In Gerra, during the entire year, the rain falls for 200.8 days and collects up to 1253mm (49.33") of precipitation.Snowfall
June through September are months without snowfall in Gerra.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 06:46 and sunset at 20:03. On the last day of September, sunrise is at 07:22 and sunset at 19:06 CEST.
Sunshine
In Gerra, the average sunshine in September is 9.4h.UV index
In Gerra, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In September, an average UV index of 3 transforms into the following instructions:
Ensure safety - Sun damage prevention is strongly urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Gerra, Switzerland
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is July (21.2°C).
The month with the lowest average high temperature is January (0.9°C).
- Average low temperature in September: 7.2°C
The month with the highest average low temperature is August (10.6°C).
The coldest month (with the lowest average low temperature) is January (-5.9°C).
Average pressure in September
Gerra, Switzerland
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is December (1020.6mbar).
The month with the lowest atmospheric pressure is April (1015.1mbar).
Average wind speed in September
Gerra, Switzerland
- Average wind speed in September: 6.3km/h
The windiest month (with the highest average wind speed) is February (7.4km/h).
The calmest month (with the lowest average wind speed) is November (5.8km/h).
Average humidity in September
Gerra, Switzerland
- Average humidity in September: 79%
The month with the highest relative humidity is November (83%).
The month with the lowest relative humidity is July (76%).
Average rainfall in September
Gerra, Switzerland
- Average rainfall in September: 63mm
The wettest month (with the highest rainfall) is November (164mm).
The driest month (with the least rainfall) is January (45mm).
Average rainfall days in September
Gerra, Switzerland
- Average rainfall days in September: 17.6 days
The month with the highest number of rainy days is July (25.5 days).
The months with the least rainy days are February and December (8.6 days).
Average snowfall in September
Gerra, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is November (334mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Gerra, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Gerra, 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: 9h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is November (Average sunshine: 5h and 24min).
Average sunshine days in September
Gerra, Switzerland
- Average sunshine days in September: 9.7 days
The month with the most sunshine days is October (14.9 days).
The month with the least sunshine days is June (3.1 days).
Average UV index in September
Gerra, Switzerland
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Gerra, Switzerland
- Average cloud cover in September: 33
The month with the most cloud cover is November (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Gerra, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July, August and December (9km).
The months with the lowest visibility are January, February, March, September, October and November (8km).
