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
The beginning of September brings a minor change in the average high-temperature, shifting from a warm 24.9°C (76.8°F) in August to a pleasant 21.5°C (70.7°F). Throughout September, Blois witnesses a consistent average low-temperature of 11.7°C (53.1°F).Humidity
In Blois, the average relative humidity in September is 73%.Rainfall
September is the month with the least rainfall. Rain falls for 9.8 days and accumulates 25mm (0.98") of precipitation.Snowfall
April through October are months without snowfall in Blois.Daylight
The average length of the day in September in Blois, France, is 12h and 34min.On the first day of the month, sunrise is at 07:14 and sunset at 20:35. On the last day of September, in Blois, sunrise is at 07:53 and sunset at 19:35 CEST.
Sunshine
The average sunshine in September is 7.8h.UV index
The average daily maximum UV index in September in Blois is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: An average UV index of 4 in September transforms into this advice:
Undertake precautions - Guarding against sun damage is counselled. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Frequently asked questions
What is the usual temperature for Blois in September?
What is the average humidity in September in Blois?
What is the driest month in Blois?
How much does it rain in Blois in September?
When it does not snow in Blois?
What is the average length of the day in September in Blois?
When are sunrise and sunset in September in Blois?
How many hours of sunshine does Blois have in September?
What is the UV index reading in September in Blois?
Average temperature in September
Blois, France
- Average high temperature in September: 21.5°C
The warmest month (with the highest average high temperature) is August (24.9°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 11.7°C
The month with the highest average low temperature is August (14.5°C).
The coldest months (with the lowest average low temperature) are January and February (1.9°C).
Average pressure in September
Blois, France
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1019.4mbar).
The month with the lowest atmospheric pressure is November (1014mbar).
Average wind speed in September
Blois, France
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is February (16.7km/h).
The calmest month (with the lowest average wind speed) is August (10.7km/h).
Average humidity in September
Blois, 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
Blois, France
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is June (57mm).
The driest month (with the least rainfall) is September (25mm).
Average rainfall days in September
Blois, France
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is September (9.8 days).
Average snowfall in September
Blois, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (12mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Blois, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.9 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
Blois, France
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 15h and 54min).
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 July (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Blois, France
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in September
Blois, France
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and November (UV index 2).
Average cloud cover in September
Blois, France
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility in September
Blois, France
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Blois, France
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