September weather forecastSien, Germany
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Sien, Germany, with an average temperature fluctuating between 9.3°C (48.7°F) and 18.9°C (66°F).Temperature
The commencement of September indicates a gentle shift in the average high-temperature, receding from August's moderately hot 23.4°C (74.1°F) to a refreshing 18.9°C (66°F). In Sien, an average low-temperature of 9.3°C (48.7°F) is recorded during September nights.Humidity
In September, the average relative humidity in Sien is 79%.Rainfall
In Sien, Germany, during September, the rain falls for 13.1 days and regularly aggregates up to 34mm (1.34") of precipitation. Throughout the year, in Sien, there are 153.9 rainfall days, and 437mm (17.2") of precipitation is accumulated.Snowfall
In Sien, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 36min.On the first day of September, sunrise is at 06:46 and sunset at 20:13. On the last day of the month, sunrise is at 07:29 and sunset at 19:10 CEST.
Sunshine
In September, the average sunshine is 8.1h.UV index
In Sien, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, an average UV index of 3 transforms into the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sien, Germany
- Average high temperature in September: 18.9°C
The warmest month (with the highest average high temperature) is July (23.5°C).
The month with the lowest average high temperature is January (2.9°C).
- Average low temperature in September: 9.3°C
The month with the highest average low temperature is August (12.7°C).
The coldest months (with the lowest average low temperature) are January and February (-1.3°C).
Average pressure in September
Sien, Germany
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is December (1018.3mbar).
The month with the lowest atmospheric pressure is November (1014.4mbar).
Average wind speed in September
Sien, Germany
- Average wind speed in September: 9km/h
The windiest month (with the highest average wind speed) is February (12.1km/h).
The calmest month (with the lowest average wind speed) is August (8.8km/h).
Average humidity in September
Sien, Germany
- Average humidity in September: 79%
The month with the highest relative humidity is December (91%).
The months with the lowest relative humidity are April, July and August (74%).
Average rainfall in September
Sien, Germany
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is July (58mm).
The driest month (with the least rainfall) is January (20mm).
Average rainfall days in September
Sien, Germany
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in September
Sien, Germany
- Average snowfall in September: 0mm
The month with the highest snowfall is February (53mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Sien, Germany
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sien, Germany
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 3h and 0min).
Average sunshine days in September
Sien, Germany
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is March (18.1 days).
The month with the least sunshine days is July (8.4 days).
Average UV index in September
Sien, Germany
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Sien, Germany
- Average cloud cover in September: 42
The month with the most cloud cover is December (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Sien, Germany
- Average visibility in September: 8km
The months with the highest visibility are April, June, July and August (9km).
The months with the lowest visibility are January, February, October, November and December (7km).
