September weather forecastSaint Moritz, Switzerland
September
Weather in September
September marks the onset of autumn in Saint Moritz with temperatures averaging around 10.1°C (50.2°F). The climate’s transition from summer to autumn invites a reduction in tourist footfall, restoring peace and tranquility to the city. Walking and biking trails become more scenic with foliage turning to hues of red and orange. It's a time for leisurely strolls in the town center, or cosy meals in local bistros. The enchanting landscapes make it an ideal month for photography enthusiasts.Temperature
As September arrives, Saint Moritz's weather displays a minor decrease in high-temperatures, transitioning from August's mild 14.5°C (58.1°F) to a cool 10.1°C (50.2°F). During the nights in September, Saint Moritz experiences a consistent average temperature of 0.7°C (33.3°F).Humidity
In Saint Moritz, the average relative humidity in September is 85%.Rainfall
In September, in Saint Moritz, the rain falls for 16.7 days. Throughout September, 68mm (2.68") of precipitation is accumulated. In Saint Moritz, Switzerland, during the entire year, the rain falls for 140.7 days and collects up to 944mm (37.17") of precipitation.Snowfall
January through December are months with snowfall in Saint Moritz. In September, it is snowing for 2.5 days. Throughout September, 85mm (3.35") of snow is accumulated. Throughout the year, in Saint Moritz, Switzerland, there are 125.3 snowfall days, and 3141mm (123.66") of snow is accumulated.Daylight
In September, the average length of the day in Saint Moritz is 12h and 33min.On the first day of the month, sunrise is at 06:41 and sunset at 19:59. On the last day of September, sunrise is at 07:18 and sunset at 19:02 CEST.
Sunshine
The average sunshine in September in Saint Moritz, Switzerland, is 7.2h.UV index
In September, the average daily maximum UV index in Saint Moritz, Switzerland, is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 2 translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Moritz, Switzerland
- Average high temperature in September: 10.1°C
The warmest month (with the highest average high temperature) is July (14.6°C).
The month with the lowest average high temperature is January (-5.1°C).
- Average low temperature in September: 0.7°C
The months with the highest average low temperature are July and August (3.8°C).
The coldest month (with the lowest average low temperature) is February (-15.1°C).
Average pressure in September
Saint Moritz, Switzerland
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is December (1020.6mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Saint Moritz, Switzerland
- Average wind speed in September: 8.2km/h
The windiest months (with the highest average wind speed) are February and December (10.3km/h).
The calmest month (with the lowest average wind speed) is August (7.9km/h).
Average humidity in September
Saint Moritz, Switzerland
- Average humidity in September: 85%
The month with the highest relative humidity is April (96%).
The month with the lowest relative humidity is July (81%).
Average rainfall in September
Saint Moritz, Switzerland
- Average rainfall in September: 68mm
The wettest month (with the highest rainfall) is August (125mm).
The driest month (with the least rainfall) is January (33mm).
Average rainfall days in September
Saint Moritz, Switzerland
- Average rainfall days in September: 16.7 days
The month with the highest number of rainy days is July (22.9 days).
The month with the least rainy days is December (1.5 days).
Average snowfall in September
Saint Moritz, Switzerland
- Average snowfall in September: 85mm
The month with the highest snowfall is November (721mm).
The month with the least snowfall is July (4mm).
Average snowfall days in September
Saint Moritz, Switzerland
- Average snowfall days in September: 2.5 days
The month with the highest number of snowfall days is March (21.2 days).
The month with the least snowfall days is August (0.3 days).
Average daylight in September /
Average sunshine in September
Saint Moritz, Switzerland
- Average daylight in September: 12h and 30min
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 42min).
- Average sunshine in September: 7h and 12min
The month with the most sunshine is July (Average sunshine: 9h and 6min).
The month with the least sunshine is November (Average sunshine: 3h and 12min).
Average sunshine days in September
Saint Moritz, Switzerland
- Average sunshine days in September: 9.8 days
The month with the most sunshine days is December (17.2 days).
The month with the least sunshine days is July (6.1 days).
Average UV index in September
Saint Moritz, Switzerland
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 3).
The months with the lowest UV index are January, February, March, April, October and November (UV index 1).
Average cloud cover in September
Saint Moritz, Switzerland
- Average cloud cover in September: 58
The month with the most cloud cover is April (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 52).
Average visibility in September
Saint Moritz, Switzerland
- Average visibility in September: 6km
The months with the highest visibility are June, July, August and December (7km).
The month with the lowest visibility is April (4km).
