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
During the shift to September, Altkirch records a mild decrease in average high-temperature, moving from a warm 24.1°C (75.4°F) in August to an enjoyable 19.9°C (67.8°F). In Altkirch, the average temperature during the nights of September drops to a frosty 9.6°C (49.3°F).Humidity
The average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall in Altkirch. Rain falls for 12.4 days and accumulates 33mm (1.3") of precipitation.Snowfall
In Altkirch, snow does not fall in April through September.Daylight
In September, the average length of the day is 12h and 34min.On the first day of September in Altkirch, sunrise is at 06:50 and sunset at 20:11. On the last day of the month, sunrise is at 07:29 and sunset at 19:12 CEST.
Sunshine
In September, the average sunshine in Altkirch is 8.9h.UV index
In Altkirch, France, 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 radiation for average individuals.Note: The UV index of 4 during September leads to these advisories:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What is the usual temperature for Altkirch in September?
What is the average humidity in September in Altkirch?
What is the driest month in Altkirch?
How many days does it rain in September in Altkirch?
When it does not snow in Altkirch?
Does it snow in Altkirch in September?
What is the average length of the day in September in Altkirch?
What time are sunrise and sunset in September in Altkirch?
How long on average sun shines in September in Altkirch?
How high is the UV index in September in Altkirch?
Average temperature in September
Altkirch, France
- Average high temperature in September: 19.9°C
The warmest month (with the highest average high temperature) is August (24.1°C).
The month with the lowest average high temperature is January (3.8°C).
- Average low temperature in September: 9.6°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 (-1.7°C).
Average pressure in September
Altkirch, France
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1020.6mbar).
The month with the lowest atmospheric pressure is November (1015.6mbar).
Average wind speed in September
Altkirch, France
- Average wind speed in September: 7.2km/h
The windiest month (with the highest average wind speed) is February (10.1km/h).
The calmest month (with the lowest average wind speed) is August (6.7km/h).
Average humidity in September
Altkirch, France
- Average humidity in September: 79%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and August (76%).
Average rainfall in September
Altkirch, France
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is June (82mm).
The driest month (with the least rainfall) is September (33mm).
Average rainfall days in September
Altkirch, France
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is May (20.8 days).
The month with the least rainy days is October (12.2 days).
Average snowfall in September
Altkirch, France
- Average snowfall in September: 0mm
The month with the highest snowfall is December (60mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Altkirch, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.3 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
Altkirch, France
- Average daylight in September: 12h and 4min
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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Altkirch, France
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is October (16 days).
The month with the least sunshine days is May (7.5 days).
Average UV index in September
Altkirch, France
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Altkirch, France
- Average cloud cover in September: 34
The months with the most cloud cover are January and December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Altkirch, France
- Average visibility in September: 8km
The months with the highest visibility are March, April, May, June, July, August and October (9km).
The months with the lowest visibility are January, February, September, November and December (8km).
Altkirch, France
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