September weather forecastSiersthal, France
September
Weather in September
September, the first month of the autumn in Siersthal, is also an enjoyable month, with an average temperature fluctuating between 19.1°C (66.4°F) and 9.4°C (48.9°F).Temperature
The advent of September brings a subtle shift in temperature, with the average high moving from a warm 23.7°C (74.7°F) in August to a comfortable 19.1°C (66.4°F). Siersthal usually reports an average low-temperature of 9.4°C (48.9°F) during the month of September.Humidity
In Siersthal, France, the average relative humidity in September is 80%.Rainfall
In September, the rain falls for 10.4 days. Throughout September, 29mm (1.14") of precipitation is accumulated. In Siersthal, during the entire year, the rain falls for 156.6 days and collects up to 400mm (15.75") of precipitation.Snowfall
April, June through October are months without snowfall.Daylight
The average length of the day in September in Siersthal is 12h and 35min.On the first day of the month, sunrise is at 06:47 and sunset at 20:13. On the last day of September, sunrise is at 07:29 and sunset at 19:11 CEST.
Sunshine
In Siersthal, the average sunshine in September is 8.2h.UV index
In Siersthal, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Ensure safety - Imperative it is to shield skin and eyes from damage. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Siersthal, France
- Average high temperature in September: 19.1°C
The warmest month (with the highest average high temperature) is July (23.8°C).
The month with the lowest average high temperature is January (3.3°C).
- Average low temperature in September: 9.4°C
The month with the highest average low temperature is August (13°C).
The coldest month (with the lowest average low temperature) is January (-1.3°C).
Average pressure in September
Siersthal, France
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1019mbar).
The month with the lowest atmospheric pressure is November (1014.7mbar).
Average wind speed in September
Siersthal, France
- Average wind speed in September: 9.2km/h
The windiest month (with the highest average wind speed) is February (13.2km/h).
The calmest month (with the lowest average wind speed) is August (9km/h).
Average humidity in September
Siersthal, France
- Average humidity in September: 80%
The month with the highest relative humidity is December (90%).
The months with the lowest relative humidity are April, July and August (75%).
Average rainfall in September
Siersthal, France
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is December (44mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in September
Siersthal, France
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (16.5 days).
The months with the least rainy days are February and September (10.4 days).
Average snowfall in September
Siersthal, France
- Average snowfall in September: 0mm
The month with the highest snowfall is December (52mm).
The months with the least snowfall are April, June, July, August, September and October (0mm).
Average snowfall days in September
Siersthal, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Siersthal, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 12min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 18min).
Average sunshine days in September
Siersthal, France
- Average sunshine days in September: 17 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is December (11.5 days).
Average UV index in September
Siersthal, France
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in September
Siersthal, France
- Average cloud cover in September: 39
The month with the most cloud cover is December (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Siersthal, France
- Average visibility in September: 8km
The months with the highest visibility are March, April, June, July and August (9km).
The months with the lowest visibility are November and December (7km).
