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
September
Weather in September
Temperature
The transition into September involves a small decrease in the average high-temperature, dipping slightly from an agreeable 22.8°C (73°F) in August to a refreshing 18.3°C (64.9°F). Throughout the month of September, the average temperature in Cognin dips to a frosty 8.5°C (47.3°F) at night.Humidity
The average relative humidity in September in Cognin is 81%.Rainfall
September is the month with the least rainfall. Rain falls for 10.3 days and accumulates 20mm (0.79") of precipitation.Snowfall
In Cognin, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 06:58 and sunset at 20:14. On the last day of the month, sunrise is at 07:34 and sunset at 19:18 CEST.
Sunshine
The average sunshine in September in Cognin is 8.3h.UV index
In September, the average daily maximum UV index in Cognin is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Cognin?
What is the average humidity in September in Cognin?
What is the driest month in Cognin?
How many days does it rain in September in Cognin?
When it does not snow in Cognin?
Does it snow in Cognin in September?
How many hours of daylight does Cognin have in September?
When is the sunrise / sunset in September in Cognin?
How long on average sun shines in September in Cognin?
How high is the UV index in September in Cognin?
Average temperature in September
Cognin, France
- Average high temperature in September: 18.3°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is January (2.8°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (12.1°C).
The coldest months (with the lowest average low temperature) are January and February (-2.8°C).
Average pressure in September
Cognin, France
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is December (1020.8mbar).
The month with the lowest atmospheric pressure is April (1015mbar).
Average wind speed in September
Cognin, France
- Average wind speed in September: 7.7km/h
The windiest month (with the highest average wind speed) is February (10.2km/h).
The calmest month (with the lowest average wind speed) is September (7.7km/h).
Average humidity in September
Cognin, France
- Average humidity in September: 81%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
Cognin, France
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is June (47mm).
The driest month (with the least rainfall) is September (20mm).
Average rainfall days in September
Cognin, France
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in September
Cognin, France
- Average snowfall in September: 0mm
The month with the highest snowfall is February (153mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Cognin, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cognin, France
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Cognin, France
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is December (17.4 days).
The month with the least sunshine days is June (12 days).
Average UV index in September
Cognin, France
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Cognin, France
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Cognin, France
- Average visibility in September: 8km
The month with the highest visibility is August (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (8km).
