September weather forecastLonnes, France
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Lonnes, France, with an average temperature ranging between max 23.3°C (73.9°F) and min 12°C (53.6°F).Temperature
The introduction of September sees an average high-temperature of a still moderately hot 23.3°C (73.9°F), hardly deviating from August. Lonnes experiences a mean low-temperature of 12°C (53.6°F) during September.Humidity
In September, the average relative humidity is 71%.Rainfall
In Lonnes, France, in September, it is raining for 8.5 days, with typically 23mm (0.91") of accumulated precipitation. In Lonnes, during the entire year, the rain falls for 160.6 days and collects up to 496mm (19.53") of precipitation.Snowfall
In Lonnes, snow does not fall in March through November.Daylight
In Lonnes, the average length of the day in September is 12h and 32min.On the first day of September in Lonnes, sunrise is at 07:20 and sunset at 20:37. On the last day of the month, sunrise is at 07:57 and sunset at 19:41 CEST.
Sunshine
The average sunshine in September in Lonnes is 8.3h.UV index
In September, the average daily maximum UV index in Lonnes is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lonnes, France
- Average high temperature in September: 23.3°C
The warmest month (with the highest average high temperature) is August (26.1°C).
The month with the lowest average high temperature is January (7.9°C).
- Average low temperature in September: 12°C
The month with the highest average low temperature is July (14.5°C).
The coldest month (with the lowest average low temperature) is February (2.5°C).
Average pressure in September
Lonnes, France
- Average pressure in September: 1018.2mbar
The month with the highest atmospheric pressure is December (1020.6mbar).
The month with the lowest atmospheric pressure is November (1014.7mbar).
Average wind speed in September
Lonnes, France
- Average wind speed in September: 10.6km/h
The windiest month (with the highest average wind speed) is February (15.5km/h).
The calmest month (with the lowest average wind speed) is August (9.6km/h).
Average humidity in September
Lonnes, France
- Average humidity in September: 71%
The months with the highest relative humidity are January, November and December (86%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Lonnes, France
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is November (67mm).
The driest month (with the least rainfall) is July (21mm).
Average rainfall days in September
Lonnes, France
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is September (8.5 days).
Average snowfall in September
Lonnes, France
- Average snowfall in September: 0mm
The month with the highest snowfall is December (5mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Lonnes, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
Lonnes, France
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Lonnes, France
- Average sunshine days in September: 19.7 days
The month with the most sunshine days is September (19.7 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in September
Lonnes, 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
Lonnes, France
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Lonnes, France
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is May (8km).
