September weather forecastLonny, France
September
Weather in September
September, the first month of the autumn in Lonny, is still a comfortable month, with temperature in the range of an average low of 9.5°C (49.1°F) and an average high of 18.5°C (65.3°F).Temperature
The onset of September results in a small decrease in the average high-temperature, moderately receding from a pleasant 22.3°C (72.1°F) in August to a refreshing 18.5°C (65.3°F). Lonny, in the month of September, anticipates a consistent average low-temperature of 9.5°C (49.1°F).Humidity
In Lonny, France, the average relative humidity in September is 81%.Rainfall
In September, in Lonny, the rain falls for 12.8 days. Throughout September, 38mm (1.5") of precipitation is accumulated. Throughout the year, in Lonny, France, there are 190 rainfall days, and 635mm (25") of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Lonny, the average length of the day in September 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 Lonny, France, sunrise is at 07:40 and sunset at 19:22 CEST.
Sunshine
In Lonny, France, the average sunshine in September is 7.7h.UV index
The average daily maximum UV index in September in Lonny is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A daily high UV index of 4 in September leads to these guidelines:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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
Lonny, 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).
