September weather forecastSillian, Austria
September
Weather in September
September, the first month of the autumn in Sillian, is still a cool month, with an average temperature varying between 3.3°C (37.9°F) and 12.7°C (54.9°F).Temperature
With the onset of September, Sillian experiences a modest temperature adjustment, with the average high-temperature gently receding from a refreshing 17°C (62.6°F) in August to a fresh 12.7°C (54.9°F). During the nights in September, Sillian experiences a consistent average temperature of 3.3°C (37.9°F).Humidity
The average relative humidity in September in Sillian is 85%.Rainfall
In Sillian, during September, the rain falls for 20.9 days and regularly aggregates up to 88mm (3.46") of precipitation. Throughout the year, in Sillian, Austria, there are 216.9 rainfall days, and 1291mm (50.83") of precipitation is accumulated.Snowfall
In Sillian, snow does not fall in June through September.Daylight
In Sillian, Austria, the average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 06:30 and sunset at 19:49. On the last day of September, sunrise is at 07:08 and sunset at 18:51 CEST.
Sunshine
In September, the average sunshine in Sillian is 8.4h.UV index
In Sillian, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 2 during September leads to these instructions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sillian, Austria
- Average high temperature in September: 12.7°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (-2.9°C).
- Average low temperature in September: 3.3°C
The month with the highest average low temperature is August (6°C).
The coldest month (with the lowest average low temperature) is January (-11.9°C).
Average pressure in September
Sillian, Austria
- Average pressure in September: 1018.1mbar
The month with the highest atmospheric pressure is December (1020.4mbar).
The month with the lowest atmospheric pressure is May (1015.4mbar).
Average wind speed in September
Sillian, Austria
- Average wind speed in September: 6.2km/h
The windiest month (with the highest average wind speed) is February (8.3km/h).
The calmest month (with the lowest average wind speed) is August (5.6km/h).
Average humidity in September
Sillian, Austria
- Average humidity in September: 85%
The month with the highest relative humidity is March (93%).
The month with the lowest relative humidity is July (83%).
Average rainfall in September
Sillian, Austria
- Average rainfall in September: 88mm
The wettest month (with the highest rainfall) is August (176mm).
The driest month (with the least rainfall) is December (59mm).
Average rainfall days in September
Sillian, Austria
- Average rainfall days in September: 20.9 days
The month with the highest number of rainy days is July (28.5 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in September
Sillian, Austria
- Average snowfall in September: 0mm
The month with the highest snowfall is February (471mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Sillian, Austria
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Sillian, Austria
- 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 24min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is November (Average sunshine: 4h and 12min).
Average sunshine days in September
Sillian, Austria
- Average sunshine days in September: 6.9 days
The month with the most sunshine days is October (12.6 days).
The month with the least sunshine days is July (1.5 days).
Average UV index in September
Sillian, Austria
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February and March (UV index 1).
Average cloud cover in September
Sillian, Austria
- Average cloud cover in September: 52
The months with the most cloud cover are March and April (Cloud cover 58).
The months with the least cloud cover are July and December (Cloud cover 45).
Average visibility in September
Sillian, Austria
- Average visibility in September: 6km
The month with the highest visibility is July (8km).
The months with the lowest visibility are January, February, March, April, May, September and November (6km).
