September weather forecast
Rouen, France

Weather in September

September, the first month of the autumn, in Rouen, is also an enjoyable month, with average temperature fluctuating between 19.4°C (66.9°F) and 10.4°C (50.7°F).

Temperature

In September, the average high-temperature is essentially the same as in August - an enjoyable 19.4°C (66.9°F). The average low-temperature, in September, is 10.4°C (50.7°F).

Humidity

The average relative humidity in September is 81%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.1 days and accumulates 24mm (0.94") of precipitation.

Snowfall

In Rouen snow does not fall in April through October.

Daylight

The average length of the day in Rouen, France, is 12.6h.

Sunshine

The average sunshine is 7.1h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Rouen?

In September, the average relative humidity is 81%.

What is the driest month in Rouen?

The month with the least rainfall is September when the rain falls for 12.1 days and typically collects 24mm (0.94") of precipitation.

How many days does it rain in September in Rouen?

In Rouen, France, in September, during 12.1 rainfall days, 24mm (0.94") of precipitation is typically accumulated.

When it does not snow in Rouen?

April through October are months without snowfall.

How many hours of daylight does Rouen have in September?

The average length of the day in September in Rouen is 12.6h.

How many hours of sunshine does Rouen have in September?

In September, the average sunshine is 7.1h.

How high is the UV index in September in Rouen?

In Rouen, France, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in September
Rouen, France

Average temperature in September - Rouen, France
  • Average high temperature in September: 19.4°C

The warmest month (with the highest average high temperature) is August (22.1°C).
The month with the lowest average high temperature is January (6.4°C).

  • Average low temperature in September: 10.4°C

The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (1.4°C).

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Average pressure in September
Rouen, France

Average pressure in September - Rouen, France
  • Average pressure in September: 1018mbar

The month with the highest atmospheric pressure is September (1018mbar).
The month with the lowest atmospheric pressure is November (1012.5mbar).

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Average wind speed in September
Rouen, France

Average wind speed in September - Rouen, France
  • Average wind speed in September: 12km/h

The windiest month (with the highest average wind speed) is February (17.7km/h).
The calmest month (with the lowest average wind speed) is August (11.5km/h).

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Average humidity in September
Rouen, France

Average humidity in September - Rouen, France
  • Average humidity in September: 81%

Months with the highest relative humidity are January and December (89%).
The month with the lowest relative humidity is August (79%).

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Average rainfall in September
Rouen, France

Average rainfall in September - Rouen, France
  • Average rainfall in September: 24mm

The wettest month (with the highest rainfall) is December (60mm).
The driest month (with the least rainfall) is September (24mm).

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Average rainfall days in September
Rouen, France

Average rainfall days in September - Rouen, France
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is September (12.1 days).

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Average snowfall in September
Rouen, France

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

The month with the highest snowfall is January (14mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Rouen, France

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

The month with the highest number of snowfall days is February (2.3 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Rouen, France
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.2h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in September: 7.1h

Months with the most sunshine are June and July (Average sunshine: 9h).
The month with the least sunshine is January (Average sunshine: 3.6h).

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Average sunshine days in September
Rouen, France

Average sunshine days in September - Rouen, France
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is September (14.6 days).
The month with the least sunshine days is July (9.4 days).

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Average UV index in September
Rouen, France

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

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Rouen, France

Average cloud cover in September - Rouen, France
  • Average cloud cover in September: 47

Months with the most cloud cover are January and November (Cloud cover 64).
The month with the least cloud cover is April (Cloud cover 46).

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Average visibility in September
Rouen, France

Average visibility in September - Rouen, France
  • Average visibility in September: 8km

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

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