September weather forecastGersau, Switzerland
September
Weather in September
The first month of the autumn, September, is also a moderate month in Gersau, Switzerland, with an average temperature ranging between max 14.7°C (58.5°F) and min 5.5°C (41.9°F).Temperature
September signifies a gentle decline in Gersau's average high-temperature, easing from an enjoyable 18.8°C (65.8°F) in August to a still refreshing 14.7°C (58.5°F). Gersau's nighttime temperature in September drops to an average of 5.5°C (41.9°F).Humidity
The average relative humidity in September in Gersau, Switzerland, is 82%.Rainfall
In September, the rain falls for 18.3 days. Throughout September, 72mm (2.83") of precipitation is accumulated. Throughout the year, there are 216.7 rainfall days, and 1294mm (50.94") of precipitation is accumulated.Snowfall
In Gersau, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 34min.On the first day of the month, sunrise is at 06:46 and sunset at 20:05. On the last day of September, sunrise is at 07:24 and sunset at 19:07 CEST.
Sunshine
In Gersau, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 3 in September translates into this advice:
Adopt protective measures - It is advised to guard against sun damage. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Gersau, Switzerland
- Average high temperature in September: 14.7°C
The warmest month (with the highest average high temperature) is August (18.8°C).
The month with the lowest average high temperature is January (-0.9°C).
- Average low temperature in September: 5.5°C
The month with the highest average low temperature is August (8.8°C).
The coldest month (with the lowest average low temperature) is February (-8°C).
Average pressure in September
Gersau, Switzerland
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1020.9mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).
Average wind speed in September
Gersau, Switzerland
- Average wind speed in September: 5.8km/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 (5.7km/h).
Average humidity in September
Gersau, Switzerland
- Average humidity in September: 82%
The month with the highest relative humidity is March (90%).
The months with the lowest relative humidity are July and August (80%).
Average rainfall in September
Gersau, Switzerland
- Average rainfall in September: 72mm
The wettest month (with the highest rainfall) is August (166mm).
The driest month (with the least rainfall) is February (70mm).
Average rainfall days in September
Gersau, Switzerland
- Average rainfall days in September: 18.3 days
The month with the highest number of rainy days is July (24.1 days).
The month with the least rainy days is February (12.3 days).
Average snowfall in September
Gersau, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (232mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Gersau, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Gersau, 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 48min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Gersau, Switzerland
- Average sunshine days in September: 9.5 days
The month with the most sunshine days is October (15.5 days).
The month with the least sunshine days is July (4.4 days).
Average UV index in September
Gersau, Switzerland
- Average UV index in September: 3
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
Gersau, Switzerland
- Average cloud cover in September: 38
The months with the most cloud cover are February, March and May (Cloud cover 48).
The months with the least cloud cover are August and October (Cloud cover 37).
Average visibility in September
Gersau, Switzerland
- Average visibility in September: 7km
The months with the highest visibility are April, May, June, July, August, October, November and December (8km).
The months with the lowest visibility are January, February, March and September (7km).
