September weather forecastCollonges, Switzerland
September
Weather in September
September, the first month of the autumn in Collonges, is also a moderate month, with an average temperature ranging between max 15.1°C (59.2°F) and min 4.9°C (40.8°F).Temperature
In Collonges, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's comfortable 19.2°C (66.6°F) to a mild 15.1°C (59.2°F). In the month of September, Collonges records a consistent average low-temperature of 4.9°C (40.8°F).Humidity
In Collonges, the average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.4 days and typically collects 34mm (1.34") of precipitation.Snowfall
June through September are months without snowfall in Collonges, Switzerland.Daylight
In Collonges, the average length of the day in September is 12h and 32min.On the first day of September in Collonges, sunrise is at 06:53 and sunset at 20:10. On the last day of the month, sunrise is at 07:29 and sunset at 19:13 CEST.
Sunshine
In Collonges, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index in Collonges is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 3 in September suggests the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Collonges, Switzerland
- Average high temperature in September: 15.1°C
The warmest month (with the highest average high temperature) is August (19.2°C).
The month with the lowest average high temperature is January (-0.2°C).
- Average low temperature in September: 4.9°C
The month with the highest average low temperature is July (8°C).
The coldest month (with the lowest average low temperature) is February (-9°C).
Average pressure in September
Collonges, Switzerland
- Average pressure in September: 1018.3mbar
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
Collonges, Switzerland
- Average wind speed in September: 6.7km/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 (6.5km/h).
Average humidity in September
Collonges, Switzerland
- Average humidity in September: 80%
The months with the highest relative humidity are February and March (88%).
The months with the lowest relative humidity are July, August and October (78%).
Average rainfall in September
Collonges, Switzerland
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is December (107mm).
The driest month (with the least rainfall) is September (34mm).
Average rainfall days in September
Collonges, Switzerland
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in September
Collonges, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (431mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Collonges, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Collonges, 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 48min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Collonges, Switzerland
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is May (8.9 days).
Average UV index in September
Collonges, Switzerland
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Collonges, Switzerland
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Collonges, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (8km).
The months with the lowest visibility are January and February (7km).
