September weather forecastSormonne, France
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Sormonne, France, with an average temperature varying between 18.5°C (65.3°F) and 9.5°C (49.1°F).Temperature
September heralds a minor drop in average high-temperature, sliding from August's agreeable 22.3°C (72.1°F) to a refreshing 18.5°C (65.3°F). Sormonne's temperature in September lowers to a consistent average of 9.5°C (49.1°F) during the nights.Humidity
The average relative humidity in September in Sormonne is 81%.Rainfall
In Sormonne, during September, the rain falls for 12.8 days and regularly aggregates up to 38mm (1.5") of precipitation. Throughout the year, there are 190 rainfall days, and 635mm (25") of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Sormonne is 12h and 37min.On the first day of the month, sunrise is at 06:57 and sunset at 20:25. On the last day of September, in Sormonne, sunrise is at 07:40 and sunset at 19:22 CEST.
Sunshine
The average sunshine in September in Sormonne is 7.7h.UV index
The average daily maximum UV index in September in Sormonne is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 4 during September translates into the following guidance:
Ensure safety - Imperative it is to shield skin and eyes from damage. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sormonne, France
- Average high temperature in September: 18.5°C
The warmest months (with the highest average high temperature) are July and August (22.3°C).
The month with the lowest average high temperature is January (3.9°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-0.1°C).
Average pressure in September
Sormonne, France
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is September (1017.8mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).
Average wind speed in September
Sormonne, France
- Average wind speed in September: 10.3km/h
The windiest month (with the highest average wind speed) is February (15.8km/h).
The calmest month (with the lowest average wind speed) is August (9.8km/h).
Average humidity in September
Sormonne, France
- Average humidity in September: 81%
The month with the highest relative humidity is December (92%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Sormonne, France
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is December (80mm).
The driest month (with the least rainfall) is April (35mm).
Average rainfall days in September
Sormonne, France
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is December (18.4 days).
The month with the least rainy days is September (12.8 days).
Average snowfall in September
Sormonne, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (56mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Sormonne, France
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (4.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sormonne, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is August (Average sunshine: 9h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 18min).
Average sunshine days in September
Sormonne, France
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is December (9.5 days).
Average UV index in September
Sormonne, 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, November and December (UV index 2).
Average cloud cover in September
Sormonne, France
- Average cloud cover in September: 42
The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Sormonne, France
- Average visibility in September: 8km
The months with the highest visibility are March, April and August (9km).
The months with the lowest visibility are January, February, May, June, July, September, October, November and December (8km).
