September weather forecastGrünwald, Switzerland
September
Weather in September
September, the first month of the autumn in Grünwald, is still a comfortable month, with temperature in the range of an average high of 18.7°C (65.7°F) and an average low of 8.3°C (46.9°F).Temperature
September is marked by a subtle drop in average high-temperatures, transitioning from a pleasant 22.8°C (73°F) in August to an enjoyable 18.7°C (65.7°F). Throughout the month of September, Grünwald sees a steady low-temperature average of 8.3°C (46.9°F).Humidity
In Grünwald, Switzerland, the average relative humidity in September is 82%.Rainfall
The month with the least rainfall is September, when the rain falls for 15.6 days and typically collects 57mm (2.24") of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Grünwald. Throughout September, in the average 0.4 snowfall days, it receives 22mm (0.87") of snow. In Grünwald, during the entire year, snow falls for 86 days and aggregates up to 1942mm (76.46") of snow.Daylight
The average length of the day in September is 12h and 34min.On the first day of September in Grünwald, sunrise is at 06:44 and sunset at 20:05. On the last day of the month, sunrise is at 07:23 and sunset at 19:06 CEST.
Sunshine
In Grünwald, the average sunshine in September is 8.1h.UV index
In Grünwald, Switzerland, 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 ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. To guard against the harmful effects of the Sun, minimize exposure during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grünwald, Switzerland
- Average high temperature in September: 18.7°C
The warmest months (with the highest average high temperature) are July and August (22.8°C).
The month with the lowest average high temperature is January (2.5°C).
- Average low temperature in September: 8.3°C
The months with the highest average low temperature are July and August (11.4°C).
The coldest month (with the lowest average low temperature) is February (-3.1°C).
Average pressure in September
Grünwald, Switzerland
- Average pressure in September: 1018.5mbar
The month with the highest atmospheric pressure is December (1020.5mbar).
The month with the lowest atmospheric pressure is November (1015.6mbar).
Average wind speed in September
Grünwald, Switzerland
- Average wind speed in September: 7.1km/h
The windiest months (with the highest average wind speed) are March and December (9.7km/h).
The calmest month (with the lowest average wind speed) is August (6.8km/h).
Average humidity in September
Grünwald, Switzerland
- Average humidity in September: 82%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and July (79%).
Average rainfall in September
Grünwald, Switzerland
- Average rainfall in September: 57mm
The wettest month (with the highest rainfall) is June (130mm).
The driest month (with the least rainfall) is September (57mm).
Average rainfall days in September
Grünwald, Switzerland
- Average rainfall days in September: 15.6 days
The month with the highest number of rainy days is May (22.8 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in September
Grünwald, Switzerland
- Average snowfall in September: 22mm
The month with the highest snowfall is December (454mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Grünwald, Switzerland
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Grünwald, Switzerland
- Average daylight in September: 12h and 36min
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 6min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Grünwald, Switzerland
- Average sunshine days in September: 12.2 days
The month with the most sunshine days is October (15.2 days).
The month with the least sunshine days is June (5.7 days).
Average UV index in September
Grünwald, Switzerland
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Grünwald, Switzerland
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Grünwald, Switzerland
- Average visibility in September: 8km
The month with the highest visibility is July (9km).
The month with the lowest visibility is January (6km).
