Alsace - France weather in September 2025
Alsace - France weather in September 2025
Day
21 °C
Night
11 °C
Precipitation
61 mm
in month
Rainy days
10 days
in month
Daylight
12 hours
average
Sunshine
6 hours
average
Humidity
76 %
Day
21 °C
Night
11 °C
Precipitation
61 mm
in month
Rainy days
10 days
in month
Daylight
12 hours
average
Sunshine
6 hours
average
Humidity
76 %
Overview: Alsace - France
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Weather overview and FAQs
Weather overview
In Alsace in September, the average air temperature ranges from 21 °C (70 °F) during the day to 11 °C (51 °F) at night. There are 10 days of rain on average, where the rainfall is 61 mm (2.39 in).
Are there good conditions to visit in September in Alsace?
There are good conditions for visiting in Alsace in September. You can expect just 10 days of rain during the month, taking an umbrella is not necessary. There are some people, who may feel a slight chill at 21 °C (70 °F), but others will feel perfectly fine. The temperature of 11 °C (51 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
How heavy is the precipitation in September in Alsace?
There is precipitation of 61 mm (2.39 in) in September in Alsace, which means 2 mm (0.08 in) rainfall per day on average.
What temperature can I expect during the day in Alsace in September?
In Alsace in September, the average daily temperatures will be 21 °C (70 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.
What is the air temperature in September in Alsace at night?
The average night temperature in Alsace in September is 11 °C (51 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.
How many rainy days can I expect in Alsace in September?
There are 10 days, which are rainy in September in Alsace, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.2 days of the week, or in general - 32 % days.
Is September part of the wet season in Alsace?
No, there is no wet season in September in Alsace - you can expect 10 days of rain during the month.
How many hours of sun to expect in September in Alsace?
In Alsace in September, you can expect around 6 hours of sunshine.
Is the weather in Alsace warmer in September than in October?
Yes, September in Alsace is warmer than October by 6 °C (42 °F).
How long is the day (from dawn till dusk) in Alsace in September?
The length of daylight in Alsace in September is 12 hours.
How humid is Alsace in September?
In Alsace in September, expect humidity around 76 %.
What is the temperature trend in Alsace in September?
During September in Alsace, the day temperatures are decreasing - from 23 °C (74 °F) at the beginning of the month to 18 °C (65 °F) at the end of the month.
Is Alsace rainier in September than in August?
No, September in Alsace is not a rainier month than August.
How windy is Alsace in September?
An average wind scale that can be expected in Alsace in September is 2. It is rather a milder or unnoticeable wind, therefore it will not bother you during your holiday.