September weather forecast
Strasbourg, France

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Traditional wooden houses in a village in Strasbourg, France
Traditional wooden houses in a village in Strasbourg, France

Weather in September

With the onset of September, Strasbourg begins its transition into the autumn season. The temperatures start to experience a significant drop from August, signaling the end of the warm summer days. The drop in rainfall quantity to 26mm (1.02") and a rise in pressure contribute to the pleasant early autumn weather. Extended daylight hours combined with reduced humidity offer a comfortable environment for outdoor endeavors. Despite the changing temperatures, sunshine hours remain optimal, leading to beautiful, crisp fall days.

Temperature

With the arrival of September, Strasbourg notices a mild change in the average high-temperature, sliding from August's warm 24.9°C (76.8°F) to an agreeable 20.5°C (68.9°F). During September, Strasbourg records an average temperature of 10°C (50°F) at night.

Humidity

In September, the average relative humidity is 76%.

Rainfall

The month with the least rainfall is September, when the rain falls for 10.5 days and typically collects 26mm (1.02") of precipitation.

Snowfall

April through September are months without snowfall.

Daylight

In Strasbourg, the average length of the day in September is 12h and 35min.
On the first day of September, sunrise is at 06:46 and sunset at 20:10. On the last day of the month, sunrise is at 07:27 and sunset at 19:09 CEST.

Sunshine

In September, the average sunshine is 8.9h.

UV index

In Strasbourg, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, a regular UV index of 4 translates into these guidelines:
Make use of precautions - It is urged to ward off sun damage. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What are the temperatures in Strasbourg in September?

The average high-temperature, in September, in Strasbourg, is 20.5°C (68.9°F), while the average low-temperature is 10°C (50°F).

What is the average humidity in September in Strasbourg?

The average relative humidity in September is 76%.

What is the driest month in Strasbourg?

September is the month with the least rainfall in Strasbourg. Rain falls for 10.5 days and accumulates 26mm (1.02") of precipitation.

How many days does it rain in September in Strasbourg?

In Strasbourg, during September, the rain falls for 10.5 days and regularly aggregates up to 26mm (1.02") of precipitation.

When it does not snow in Strasbourg?

April through September are months without snowfall.

Does it snow in Strasbourg in September?

In Strasbourg, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Strasbourg have in September?

In September, the average day length in Strasbourg is 12h and 35min.

When are sunrise and sunset in September in Strasbourg?

On the first day of September, sunrise is at 06:46 and sunset at 20:10. On the last day of the month, sunrise is at 07:27 and sunset at 19:09 CEST.

How many hours of sunshine does Strasbourg have in September?

In Strasbourg, the average sunshine duration in September is 8.9h.

What is the UV index reading in September in Strasbourg?

In Strasbourg, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Strasbourg, France

Average temperature in September - Strasbourg, France
  • Average high temperature in September: 20.5°C

The warmest month (with the highest average high temperature) is August (24.9°C).
The month with the lowest average high temperature is January (4.3°C).

  • Average low temperature in September: 10°C

The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (-0.7°C).

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Average pressure in September
Strasbourg, France

Average pressure in September - Strasbourg, France
  • Average pressure in September: 1018.4mbar

The month with the highest atmospheric pressure is December (1019.8mbar).
The month with the lowest atmospheric pressure is November (1015.2mbar).

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Average wind speed in September
Strasbourg, France

Average wind speed in September - Strasbourg, France
  • Average wind speed in September: 7.7km/h

The windiest month (with the highest average wind speed) is February (11km/h).
The calmest month (with the lowest average wind speed) is August (7.4km/h).

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Average humidity in September
Strasbourg, France

Average humidity in September - Strasbourg, France
  • Average humidity in September: 76%

The months with the highest relative humidity are January and December (86%).
The months with the lowest relative humidity are April, July and August (73%).

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Average rainfall in September
Strasbourg, France

Average rainfall in September - Strasbourg, France
  • Average rainfall in September: 26mm

The wettest months (with the highest rainfall) are June and July (56mm).
The driest month (with the least rainfall) is September (26mm).

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Average rainfall days in September
Strasbourg, France

Average rainfall days in September - Strasbourg, France
  • Average rainfall days in September: 10.5 days

The months with the highest number of rainy days are May and July (17.1 days).
The month with the least rainy days is September (10.5 days).

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Average snowfall in September
Strasbourg, France

Average snowfall in September - Strasbourg, France
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (40mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).

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Average snowfall days in September
Strasbourg, France

Average snowfall days in September - Strasbourg, France
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Strasbourg, France

Average daylight in September / Average sunshine in September - Strasbourg, 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 24min).

  • 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 January (Average sunshine: 4h and 30min).

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Average sunshine days in September
Strasbourg, France

Average sunshine days in September - Strasbourg, France
  • Average sunshine days in September: 17.2 days

The month with the most sunshine days is October (17.3 days).
The month with the least sunshine days is July (10.8 days).

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Average UV index in September
Strasbourg, France

Average UV index in September - Strasbourg, France
  • Average UV index in September: 4

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Strasbourg, France

Average cloud cover in September - Strasbourg, France
  • Average cloud cover in September: 33

The months with the most cloud cover are January and December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in September
Strasbourg, France

Average visibility in September - Strasbourg, France
  • Average visibility in September: 9km

The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and December (8km).

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Strasbourg, France

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