Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September signifies a gentle decline in Épernon's average high-temperature, easing from a moderately hot 24.1°C (75.4°F) in August to a pleasant 20.7°C (69.3°F). Throughout the month of September, Épernon observes an average nighttime temperature of 11.4°C (52.5°F).Humidity
The average relative humidity in September is 73%.Rainfall
September is the month with the least rainfall. Rain falls for 10.1 days and accumulates 16mm (0.63") of precipitation.Snowfall
In Épernon, snow does not fall in April through October.Daylight
In Épernon, the average length of the day in September is 12h and 35min.On the first day of the month, sunrise is at 07:11 and sunset at 20:35. On the last day of September, sunrise is at 07:52 and sunset at 19:34 CEST.
Sunshine
In September, the average sunshine is 7.4h.UV index
In Épernon, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Frequently asked questions
What is the temperature in September in Épernon?
What is the average humidity in September in Épernon?
What is the driest month in Épernon?
How much does it rain in Épernon in September?
When it does not snow in Épernon?
How many hours of daylight does Épernon have in September?
When are sunrise and sunset in September in Épernon?
How long on average sun shines in September in Épernon?
What is the UV index reading in September in Épernon?
Average temperature in September
Épernon, 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).
Average pressure in September
Épernon, 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).
Average wind speed in September
Épernon, 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).
Average humidity in September
Épernon, France
- Average humidity in September: 73%
The months with the highest relative humidity are January and December (88%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Épernon, 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).
Average rainfall days in September
Épernon, 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).
Average snowfall in September
Épernon, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (22mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Épernon, France
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2 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
Épernon, 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: 7h and 2min
The months with the most sunshine are July and August (Average sunshine: 8h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Épernon, France
- Average sunshine days in September: 17.7 days
The 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).
Average UV index in September
Épernon, 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
Épernon, 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).
Average visibility in September
Épernon, France
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, May and June (8km).
Épernon, France
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