September weather forecastDieppe, France

September

Weather in September

September, the first month of the autumn in Dieppe, is also an enjoyable month, with temperature in the range of an average high of 17.9°C (64.2°F) and an average low of 13.9°C (57°F).

Temperature

As September unfolds, the average high-temperature reaches a still enjoyable 17.9°C (64.2°F), hinting at a slight fluctuation from the previous month. Dieppe maintains an average low-temperature of 13.9°C (57°F) throughout September's nights.

Humidity

With an average relative humidity of 79%, September is the least humid month.

Rainfall

In Dieppe, France, during September, the rain falls for 13.3 days and regularly aggregates up to 27mm (1.06") of precipitation. In Dieppe, during the entire year, the rain falls for 177.4 days and collects up to 428mm (16.85") of precipitation.

Snowfall

In Dieppe, snow does not fall in April through October.

Sea temperature

August and September, with an average sea temperature of 17.9°C (64.2°F), are months with the warmest seawater in Dieppe.
Note: Most individuals do not find swimming at 17.9°C (64.2°F) to be enjoyable. As the water temperature declines below 21°C (69.8°F), maintaining control over one's breathing becomes harder.

Daylight

In September, the average length of the day in Dieppe, France, is 12h and 37min.
On the first day of the month, sunrise is at 07:11 and sunset at 20:39. On the last day of September, sunrise is at 07:54 and sunset at 19:36 CEST.

Sunshine

The average sunshine in September in Dieppe is 7.4h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: A typical high UV index of 4 in September suggests the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.

Updated: Feb 8, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In September, the average high-temperature and low-temperature in Dieppe, France, are 17.9°C (64.2°F) and 13.9°C (57°F) respectively.

September is the least humid month, with an average relative humidity of 79%.

In September, the average relative humidity in Dieppe, France, is 79%.

In Dieppe, France, in September, it is raining for 13.3 days, with typically 27mm (1.06") of accumulated precipitation.

In Dieppe, France, snow does not fall in April through October.

The months with the warmest seawater are August and September, with an average sea temperature of 17.9°C (64.2°F).

In Dieppe, France, in September, the average water temperature is 17.9°C (64.2°F). Swimming in 17.9°C (64.2°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

In September, the average day length in Dieppe is 12h and 37min.

On the first day of September in Dieppe, sunrise is at 07:11 and sunset at 20:39. On the last day of the month, sunrise is at 07:54 and sunset at 19:36 CEST.

In September, the average sunshine duration in Dieppe, France, is 7.4h.

In Dieppe, France, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

19.5°C

17.9°C

15.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

18.5km/h

19.8km/h

23.8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

13.3

16.7

Average snowfall

0mm

Average snowfall days

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

11.3

13.6

11.8

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Dieppe, France

Average high temperature in September: 17.9°C

The warmest month (with the highest average high temperature) is August (19.5°C).
The months with the lowest average high temperature are January and February (7.3°C).

Average low temperature in September: 13.9°C

The month with the highest average low temperature is August (15.4°C).
The coldest month (with the lowest average low temperature) is February (4.2°C).

Average pressure in September
Dieppe, France

Average pressure in September: 1017.8mbar

The month with the highest atmospheric pressure is September (1017.8mbar).
The month with the lowest atmospheric pressure is November (1012.1mbar).

Average wind speed in September
Dieppe, France

Average wind speed in September: 19.2km/h

The windiest month (with the highest average wind speed) is December (27.5km/h).
The calmest month (with the lowest average wind speed) is July (17.3km/h).

Average humidity in September
Dieppe, France

Average humidity in September: 79%

The month with the highest relative humidity is June (84%).
The month with the lowest relative humidity is September (79%).

Average rainfall in September
Dieppe, France

Average rainfall in September: 27mm

The wettest month (with the highest rainfall) is December (51mm).
The driest month (with the least rainfall) is April (23mm).

Average rainfall days in September
Dieppe, France

Average rainfall days in September: 13.3 days

The month with the highest number of rainy days is October (16.7 days).
The month with the least rainy days is April (12.4 days).

Average snowfall in September
Dieppe, France

Average snowfall in September: 0mm

The month with the highest snowfall is January (11mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in September
Dieppe, France

Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (1.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September
Dieppe, France

Average sea temperature in September: 17.9°C

The best months for swimming (with the highest average sea temperature) are August and September (17.9°C).
The coldest month (with the lowest average sea temperature) is March (8.2°C).

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

Average daylight in September: 12h and 36min

The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).

Average sunshine in September: 7h and 24min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and November (Average sunshine: 4h and 0min).

Average sunshine days in September
Dieppe, France

Average sunshine days in September: 13.6 days

The month with the most sunshine days is April (14.6 days).
The month with the least sunshine days is November (10.4 days).

Average UV index in September
Dieppe, France

Average UV index in September: 4

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Dieppe, France

Average cloud cover in September: 40

The months with the most cloud cover are November and December (Cloud cover 60).
The months with the least cloud cover are April, July and August (Cloud cover 39).

Average visibility in September
Dieppe, France

Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).