September weather forecastRoche, Switzerland
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Roche, Switzerland, with an average temperature ranging between max 16°C (60.8°F) and min 6°C (42.8°F).Temperature
The shift from August to September coincides with a small decrease in the average high-temperature, down to a still enjoyable 16°C (60.8°F) from a comfortable 19.8°C (67.6°F). September in Roche, Switzerland, sees the temperature falling to a mean low of 6°C (42.8°F).Humidity
In Roche, the average relative humidity in September is 80%.Rainfall
September is the month with the least rainfall in Roche. Rain falls for 16.9 days and accumulates 54mm (2.13") of precipitation.Snowfall
Months with snowfall in Roche, Switzerland, are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 1mm (0.04") of snow. In Roche, during the entire year, snow falls for 31.1 days and aggregates up to 561mm (22.09") of snow.Daylight
In September, the average length of the day in Roche is 12h and 33min.On the first day of September in Roche, Switzerland, sunrise is at 06:53 and sunset at 20:11. On the last day of the month, sunrise is at 07:30 and sunset at 19:14 CEST.
Sunshine
In September, the average sunshine is 8.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A typical high UV index of 3 in September suggests the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Roche, Switzerland
- Average high temperature in September: 16°C
The warmest months (with the highest average high temperature) are July and August (19.8°C).
The month with the lowest average high temperature is January (0.6°C).
- Average low temperature in September: 6°C
The month with the highest average low temperature is July (9.3°C).
The coldest month (with the lowest average low temperature) is February (-7.1°C).
Average pressure in September
Roche, Switzerland
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1021.1mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Roche, Switzerland
- Average wind speed in September: 6.9km/h
The windiest month (with the highest average wind speed) is December (9.2km/h).
The calmest month (with the lowest average wind speed) is August (6.5km/h).
Average humidity in September
Roche, Switzerland
- Average humidity in September: 80%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
Roche, Switzerland
- Average rainfall in September: 54mm
The wettest month (with the highest rainfall) is May (144mm).
The driest month (with the least rainfall) is September (54mm).
Average rainfall days in September
Roche, Switzerland
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is May (23.5 days).
The month with the least rainy days is October (13.3 days).
Average snowfall in September
Roche, Switzerland
- Average snowfall in September: 1mm
The month with the highest snowfall is January (148mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Roche, Switzerland
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (8.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Roche, Switzerland
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Roche, Switzerland
- Average sunshine days in September: 9.6 days
The month with the most sunshine days is October (15 days).
The month with the least sunshine days is May (4.3 days).
Average UV index in September
Roche, Switzerland
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Roche, Switzerland
- Average cloud cover in September: 33
The months with the most cloud cover are January, February, March, May and December (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Roche, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are October and November (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and December (8km).
