September weather forecastRietheim, Switzerland
September
Weather in September
September, the first month of the autumn in Rietheim, is also an enjoyable month, with temperature in the range of an average high of 17.6°C (63.7°F) and an average low of 7.7°C (45.9°F).Temperature
Rietheim's September weather shows a modest shift in high-temperatures, falling from August's agreeable 21.8°C (71.2°F) to a comfortable 17.6°C (63.7°F). September in Rietheim sees the temperature falling to a mean low of 7.7°C (45.9°F).Humidity
In Rietheim, Switzerland, the average relative humidity in September is 84%.Rainfall
September is the month with the least rainfall. Rain falls for 15.5 days and accumulates 51mm (2.01") of precipitation.Snowfall
June through September are months without snowfall.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 20:07. On the last day of September, in Rietheim, sunrise is at 07:25 and sunset at 19:08 CEST.
Sunshine
In September, the average sunshine is 7.8h.UV index
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 exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rietheim, Switzerland
- Average high temperature in September: 17.6°C
The warmest month (with the highest average high temperature) is July (21.9°C).
The month with the lowest average high temperature is January (1.5°C).
- Average low temperature in September: 7.7°C
The months with the highest average low temperature are July and August (11.3°C).
The coldest months (with the lowest average low temperature) are January and February (-3.8°C).
Average pressure in September
Rietheim, Switzerland
- Average pressure in September: 1018.7mbar
The month with the highest atmospheric pressure is December (1020.5mbar).
The month with the lowest atmospheric pressure is November (1015.6mbar).
Average wind speed in September
Rietheim, Switzerland
- Average wind speed in September: 7.6km/h
The windiest month (with the highest average wind speed) is March (10.2km/h).
The calmest month (with the lowest average wind speed) is August (7.2km/h).
Average humidity in September
Rietheim, Switzerland
- Average humidity in September: 84%
The month with the highest relative humidity is January (92%).
The months with the lowest relative humidity are April and July (80%).
Average rainfall in September
Rietheim, Switzerland
- Average rainfall in September: 51mm
The wettest month (with the highest rainfall) is August (109mm).
The driest month (with the least rainfall) is September (51mm).
Average rainfall days in September
Rietheim, Switzerland
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is February (6.7 days).
Average snowfall in September
Rietheim, Switzerland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (291mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Rietheim, Switzerland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rietheim, Switzerland
- Average daylight in September: 12h and 36min
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 30min).
- Average sunshine in September: 7h and 48min
The months with the most sunshine are July and August (Average sunshine: 9h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 42min).
Average sunshine days in September
Rietheim, Switzerland
- Average sunshine days in September: 13 days
The month with the most sunshine days is October (15.6 days).
The month with the least sunshine days is May (7.2 days).
Average UV index in September
Rietheim, Switzerland
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January and November (UV index 1).
Average cloud cover in September
Rietheim, Switzerland
- Average cloud cover in September: 45
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Rietheim, Switzerland
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July, August and September (8km).
The months with the lowest visibility are January and February (6km).
