September weather forecast
Semerville, France

September

Weather in September

The first month of the autumn, September, is still a pleasant month in Semerville, France, with an average temperature fluctuating between 21.1°C (70°F) and 11.7°C (53.1°F).

Temperature

With the onset of September, the average high-temperature subtly recedes from August's moderately hot 24.8°C (76.6°F) to an agreeable 21.1°C (70°F). During the month of September, Semerville experiences a steady low-temperature average of 11.7°C (53.1°F).

Humidity

In Semerville, the average relative humidity in September is 73%.

Rainfall

The month with the least rainfall is September, when the rain falls for 10.5 days and typically collects 21mm (0.83") of precipitation.

Snowfall

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

Daylight

The average length of the day in September is 12h and 34min.
On the first day of the month, sunrise is at 07:13 and sunset at 20:35. On the last day of September, sunrise is at 07:52 and sunset at 19:35 CEST.

Sunshine

The average sunshine in September is 7.8h.

UV index

In September, the average daily maximum UV index in Semerville, France, is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 4 in September translates into the following instructions:
Undertake protective steps - Preventing sun damage is advised. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.

Frequently asked questions

What are the temperatures in September?
Semerville in September has an average high-temperature of 21.1°C (70°F) and an average low-temperature of 11.7°C (53.1°F).
What is the average humidity in September?
In Semerville, the average relative humidity in September is 73%.
What is the driest month?
September is the month with the least rainfall. Rain falls for 10.5 days and accumulates 21mm (0.83") of precipitation.
How many days does it rain in September?
In Semerville, France, in September, it is raining for 10.5 days, with typically 21mm (0.83") of accumulated precipitation.
When it does not snow?
April through October are months without snowfall.
What is the average length of the day in September?
In September, the average day length is 12h and 34min.
What time are sunrise and sunset in September?
On the first day of September, sunrise is at 07:13 and sunset at 20:35. On the last day of the month, sunrise is at 07:52 and sunset at 19:35 CEST.
How many hours of sunshine does Semerville have in September?
In September, the average sunshine duration is 7.8h.
What is the UV index reading in September?
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
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 - Semerville, France
Average temperature in September
Semerville, France
  • Average high temperature in September: 21.1°C

The warmest month (with the highest average high temperature) is August (24.8°C).
The month with the lowest average high temperature is January (6.4°C).

  • Average low temperature in September: 11.7°C

The month with the highest average low temperature is August (14.8°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).

Average pressure in September - Semerville, France
Average pressure in September
Semerville, France
  • Average pressure in September: 1018.2mbar

The month with the highest atmospheric pressure is December (1019.2mbar).
The month with the lowest atmospheric pressure is November (1014mbar).

Average wind speed in September - Semerville, France
Average wind speed in September
Semerville, France
  • Average wind speed in September: 10.7km/h

The windiest month (with the highest average wind speed) is February (16km/h).
The calmest month (with the lowest average wind speed) is August (10.2km/h).

Average humidity in September - Semerville, France
Average humidity in September
Semerville, France
  • Average humidity in September: 73%

The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is August (70%).

Average rainfall in September - Semerville, France
Average rainfall in September
Semerville, France
  • Average rainfall in September: 21mm

The wettest month (with the highest rainfall) is June (51mm).
The driest month (with the least rainfall) is September (21mm).

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

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is September (10.5 days).

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

The month with the highest snowfall is February (15mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

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

The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Semerville, France
Average daylight in September /
Average sunshine in September
Semerville, France
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in September: 7h and 5min

The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in September - Semerville, France
Average sunshine days in September
Semerville, France
  • Average sunshine days in September: 17.7 days

The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is December (11.3 days).

Average UV index in September - Semerville, France
Average UV index in September
Semerville, 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 - Semerville, France
Average cloud cover in September
Semerville, France
  • Average cloud cover in September: 36

The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 36).

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

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

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