Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
With the commencement of September, Unterwasser records a moderate temperature decline, with the average high easing from August's agreeable 21.8°C (71.2°F) to a comfortable 17.4°C (63.3°F). In the month of September, the nighttime temperature dips to a steady average of 7°C (44.6°F).Humidity
In September, the average relative humidity in Unterwasser is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 11.4 days and accumulates 38mm (1.5") of precipitation.Snowfall
Months with snowfall in Unterwasser, Switzerland, are January through May, August through December. In September, it is snowing for 0.2 days. Throughout September, 4mm (0.16") of snow is accumulated. In Unterwasser, during the entire year, snow falls for 90.5 days and aggregates up to 3420mm (134.65") of snow.Daylight
In Unterwasser, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 06:42 and sunset at 20:02. On the last day of September, in Unterwasser, Switzerland, sunrise is at 07:20 and sunset at 19:04 CEST.
Sunshine
In September, the average sunshine in Unterwasser, Switzerland, is 9.3h.UV index
In Unterwasser, Switzerland, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 3 suggests this advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Unterwasser?
What is the average humidity in September in Unterwasser?
What is the driest month in Unterwasser?
How many days does it rain in September in Unterwasser?
How many days does it snow in September in Unterwasser?
What is the average length of the day in September in Unterwasser?
When is the sunrise / sunset in September in Unterwasser?
How long on average sun shines in September in Unterwasser?
What is the UV index intensity in September in Unterwasser?
Average temperature in September
Unterwasser, Switzerland
- Average high temperature in September: 17.4°C
The warmest month (with the highest average high temperature) is August (21.8°C).
The month with the lowest average high temperature is January (1.5°C).
- Average low temperature in September: 7°C
The month with the highest average low temperature is August (10.8°C).
The coldest month (with the lowest average low temperature) is February (-5.8°C).
Average pressure in September
Unterwasser, Switzerland
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1020.8mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Unterwasser, Switzerland
- Average wind speed in September: 6.3km/h
The windiest month (with the highest average wind speed) is December (8km/h).
The calmest month (with the lowest average wind speed) is August (6.2km/h).
Average humidity in September
Unterwasser, Switzerland
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are July and August (77%).
Average rainfall in September
Unterwasser, Switzerland
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is December (127mm).
The driest month (with the least rainfall) is September (38mm).
Average rainfall days in September
Unterwasser, Switzerland
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in September
Unterwasser, Switzerland
- Average snowfall in September: 4mm
The month with the highest snowfall is January (813mm).
The months with the least snowfall are June and July (0mm).
Average snowfall days in September
Unterwasser, Switzerland
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (18.4 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Unterwasser, Switzerland
- Average daylight in September: 12h and 4min
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 36min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Unterwasser, Switzerland
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in September
Unterwasser, Switzerland
- Average UV index in September: 3
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
Unterwasser, Switzerland
- Average cloud cover in September: 34
The months with the most cloud cover are January and February (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Unterwasser, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are June and August (9km).
The months with the lowest visibility are January, February and December (7km).
