Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a moderately hot 23.7°C (74.7°F) in August to a refreshing 19.4°C (66.9°F). Throughout September, the temperature falls to an average low of 9.5°C (49.1°F).Humidity
In September, the average relative humidity in Altviller is 79%.Rainfall
In September, in Altviller, the rain falls for 9.8 days. Throughout September, 28mm (1.1") of precipitation is accumulated. Throughout the year, there are 155.4 rainfall days, and 384mm (15.12") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 35min.On the first day of September in Altviller, sunrise is at 06:50 and sunset at 20:15. On the last day of the month, sunrise is at 07:32 and sunset at 19:13 CEST.
Sunshine
The average sunshine in September in Altviller, France, is 8h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 3 during September leads to these advisories:
Make use of precautions - Shielding skin and eyes from injury is a requirement. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Frequently asked questions
What is the temperature in September in Altviller?
What is the average humidity in September in Altviller?
How much does it rain in Altviller in September?
When it does not snow in Altviller?
How many hours of daylight does Altviller have in September?
When are sunrise and sunset in September in Altviller?
How long on average sun shines in September in Altviller?
How high is the UV index in September in Altviller?
Average temperature in September
Altviller, France
- Average high temperature in September: 19.4°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 (3.7°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (-0.5°C).
Average pressure in September
Altviller, France
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1019.2mbar).
The month with the lowest atmospheric pressure is November (1014.8mbar).
Average wind speed in September
Altviller, France
- Average wind speed in September: 10.1km/h
The windiest month (with the highest average wind speed) is February (15.2km/h).
The calmest month (with the lowest average wind speed) is August (9.8km/h).
Average humidity in September
Altviller, France
- Average humidity in September: 79%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Altviller, France
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is December (46mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Altviller, France
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is September (9.8 days).
Average snowfall in September
Altviller, France
- Average snowfall in September: 0mm
The month with the highest snowfall is December (38mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Altviller, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Altviller, France
- Average daylight in September: 12h and 4min
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 0min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in September
Altviller, France
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is September (17.3 days).
The month with the least sunshine days is December (11.8 days).
Average UV index in September
Altviller, France
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Altviller, France
- Average cloud cover in September: 39
The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Altviller, France
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August and September (9km).
The months with the lowest visibility are January, October, November and December (8km).
Altviller, France
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