September weather forecastArosa, Switzerland
September weather for Arosa, Switzerland: In Arosa, Switzerland, in September, snow falls for 2.2 days, with typically accumulated 45mm (1.77") of snow. In September, in Arosa, Switzerland, the rain falls for 10.5 days.
September
Weather in September
September, the first month of the autumn in Arosa, is still a mild month, with temperature in the range of an average low of 3.1°C (37.6°F) and an average high of 13°C (55.4°F).Temperature
September heralds a minor drop in average high-temperature, sliding from August's enjoyable 17.2°C (63°F) to a mild 13°C (55.4°F). Arosa records a consistent low-temperature of 3.1°C (37.6°F) during September nights.Humidity
The average relative humidity in September is 82%.Rainfall
In Arosa, during September, the rain falls for 10.5 days and regularly aggregates up to 25mm (0.98") of precipitation. In Arosa, during the entire year, the rain falls for 114.4 days and collects up to 366mm (14.41") of precipitation.Snowfall
January through December are months with snowfall in Arosa, Switzerland. In September, in Arosa, it is snowing for 2.2 days. Throughout September, 45mm (1.77") of snow is accumulated. In Arosa, during the entire year, snow falls for 98.4 days and aggregates up to 1130mm (44.49") of snow.Daylight
In September, the average length of the day is 12h and 33min.On the first day of the month, sunrise is at 06:41 and sunset at 20:00. On the last day of September, in Arosa, sunrise is at 07:19 and sunset at 19:02 CEST.
Sunshine
In September, the average sunshine in Arosa is 8.9h.UV index
The average daily maximum UV index in September in Arosa, Switzerland, is 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 in September interprets into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Arosa, Switzerland
- Average high temperature in September: 13°C
The warmest months (with the highest average high temperature) are July and August (17.2°C).
The month with the lowest average high temperature is January (-2.8°C).
- Average low temperature in September: 3.1°C
The month with the highest average low temperature is August (6.3°C).
The coldest month (with the lowest average low temperature) is February (-11.3°C).
Average pressure in September
Arosa, Switzerland
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The month with the lowest atmospheric pressure is April (1015.4mbar).
Average wind speed in September
Arosa, Switzerland
- Average wind speed in September: 6.6km/h
The windiest month (with the highest average wind speed) is November (8.2km/h).
The calmest month (with the lowest average wind speed) is August (6.4km/h).
Average humidity in September
Arosa, Switzerland
- Average humidity in September: 82%
The month with the highest relative humidity is March (92%).
The month with the lowest relative humidity is July (79%).
Average rainfall in September
Arosa, Switzerland
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is August (51mm).
The driest month (with the least rainfall) is February (18mm).
Average rainfall days in September
Arosa, Switzerland
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is November (4.4 days).
Average snowfall in September
Arosa, Switzerland
- Average snowfall in September: 45mm
The month with the highest snowfall is November (171mm).
The month with the least snowfall is July (9mm).
Average snowfall days in September
Arosa, Switzerland
- Average snowfall days in September: 2.2 days
The month with the highest number of snowfall days is March (16.3 days).
The month with the least snowfall days is August (0.4 days).
Average daylight in September /
Average sunshine in September
Arosa, Switzerland
- Average daylight in September: 12h and 36min
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: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 5h and 6min).
Average sunshine days in September
Arosa, Switzerland
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is October (18.2 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in September
Arosa, Switzerland
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January and November (UV index 1).
Average cloud cover in September
Arosa, Switzerland
- Average cloud cover in September: 42
The month with the most cloud cover is March (Cloud cover 52).
The months with the least cloud cover are August and October (Cloud cover 40).
Average visibility in September
Arosa, Switzerland
- Average visibility in September: 7km
The months with the highest visibility are July and August (8km).
The months with the lowest visibility are January, February and March (6km).
