September weather forecast and climate
Chartres, France

Weather in September

The first month of the autumn, September, is still a pleasant month in Chartres, France, with average temperature varying between 11.4°C (52.5°F) and 20.7°C (69.3°F).

Temperature

In September, the average high-temperature slightly decreases, from a moderately hot 24.1°C (75.4°F) in August, to a pleasant 20.7°C (69.3°F). In Chartres, France,, the average low-temperature is 11.4°C (52.5°F).

Humidity

The average relative humidity in Chartres is 73%.

Rainfall

September is the month with the least rainfall in Chartres, France. Rain falls for 10.1 days and accumulates 16mm (0.63") of precipitation.

Snowfall

In Chartres snow does not fall in April through October.

Daylight

In Chartres, the average length of the day in September is 12.6h.

Sunshine

In September, the average sunshine in Chartres is 7.4h.

UV index

In September, the average daily maximum UV index in Chartres is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. 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 Chartres?

The average relative humidity in September is 73%.

What is the driest month in Chartres?

September is the month with the least rainfall. Rain falls for 10.1 days and accumulates 16mm (0.63") of precipitation.

How much does it rain in Chartres in September?

In September, in Chartres, the rain falls for 10.1 days. Throughout September, 16mm (0.63") of precipitation is accumulated.

When it does not snow in Chartres?

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

What is the average length of the day in September in Chartres?

In Chartres, France, the average length of the day in September is 12.6h.

How many hours of sunshine does Chartres have in September?

The average sunshine in September in Chartres is 7.4h.

What is the UV index reading in September in Chartres?

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in September
Chartres, France

Average temperature in September - Chartres, France
  • Average high temperature in September: 20.7°C

The warmest month (with the highest average high temperature) is August (24.1°C).
The month with the lowest average high temperature is January (6°C).

  • Average low temperature in September: 11.4°C

The month with the highest average low temperature is August (14.3°C).
The coldest months (with the lowest average low temperature) are January and February (1.3°C).

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Average pressure in September
Chartres, France

Average pressure in September - Chartres, France
  • Average pressure in September: 1018.1mbar

The month with the highest atmospheric pressure is December (1018.5mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).

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Average wind speed in September
Chartres, France

Average wind speed in September - Chartres, France
  • Average wind speed in September: 11.6km/h

The windiest month (with the highest average wind speed) is February (17.2km/h).
The calmest month (with the lowest average wind speed) is August (11.1km/h).

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Average humidity in September
Chartres, France

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

Months with the highest relative humidity are January and December (88%).
The month with the lowest relative humidity is August (70%).

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Average rainfall in September
Chartres, France

Average rainfall in September - Chartres, France
  • Average rainfall in September: 16mm

The wettest month (with the highest rainfall) is June (49mm).
The driest month (with the least rainfall) is September (16mm).

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Average rainfall days in September
Chartres, France

Average rainfall days in September - Chartres, France
  • Average rainfall days in September: 10.1 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is September (10.1 days).

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Average snowfall in September
Chartres, France

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

The month with the highest snowfall is January (22mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Chartres, France

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

Months with the highest number of snowfall days are January and February (2 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
Chartres, France

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

The month with the longest days is June (Average daylight: 16h).
The month with the shortest days is December (Average daylight: 8.4h).

  • Average sunshine in September: 7.4h

Months with the most sunshine are July and August (Average sunshine: 8.9h).
The month with the least sunshine is January (Average sunshine: 3.8h).

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Average sunshine days in September
Chartres, France

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

Months with the most sunshine days are September and October (17.7 days).
The month with the least sunshine days is June (9.4 days).

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Average UV index in September
Chartres, France

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

Months with the highest UV index are June, July and August (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
Chartres, France

Average cloud cover in September - Chartres, France
  • Average cloud cover in September: 39

The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 39).

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Average visibility in September
Chartres, France

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

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

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