September weather forecastLongwy, France
September
Weather in September
September, the first month of the autumn in Longwy, is still a comfortable month, with an average temperature varying between 18.5°C (65.3°F) and 9.3°C (48.7°F).Temperature
Longwy in September experiences a gentle temperature dip, with average high-temperatures reducing from a pleasant 22.3°C (72.1°F) in August to an enjoyable 18.5°C (65.3°F). Longwy's average low-temperature for the month of September records at a chilly 9.3°C (48.7°F).Humidity
In September, the average relative humidity in Longwy is 81%.Rainfall
In Longwy, during September, the rain falls for 12.5 days and regularly aggregates up to 41mm (1.61") of precipitation. In Longwy, during the entire year, the rain falls for 179.3 days and collects up to 612mm (24.09") of precipitation.Snowfall
In Longwy, snow does not fall in May through October.Daylight
The average length of the day in September in Longwy is 12h and 36min.On the first day of the month, sunrise is at 06:53 and sunset at 20:20. On the last day of September, sunrise is at 07:36 and sunset at 19:17 CEST.
Sunshine
The average sunshine in September is 7.8h.UV index
In September, the average daily maximum UV index in Longwy, France, is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 translates into these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Longwy, 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 (3.6°C).
- Average low temperature in September: 9.3°C
The months with the highest average low temperature are July and August (12.3°C).
The coldest month (with the lowest average low temperature) is January (-0.8°C).
Average pressure in September
Longwy, France
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is December (1018.2mbar).
The month with the lowest atmospheric pressure is November (1013.9mbar).
Average wind speed in September
Longwy, France
- Average wind speed in September: 10.5km/h
The windiest month (with the highest average wind speed) is February (16.1km/h).
The calmest month (with the lowest average wind speed) is August (10km/h).
Average humidity in September
Longwy, France
- Average humidity in September: 81%
The month with the highest relative humidity is December (92%).
The months with the lowest relative humidity are April and August (78%).
Average rainfall in September
Longwy, France
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is December (74mm).
The driest month (with the least rainfall) is April (33mm).
Average rainfall days in September
Longwy, France
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (11.9 days).
Average snowfall in September
Longwy, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (62mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Longwy, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.6 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
Longwy, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is July (Average sunshine: 9h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 0min).
Average sunshine days in September
Longwy, France
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is September (15.2 days).
The months with the least sunshine days are June, November and December (9.6 days).
Average UV index in September
Longwy, France
- Average UV index in September: 3
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
Longwy, France
- Average cloud cover in September: 42
The month with the most cloud cover is December (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Longwy, France
- Average visibility in September: 8km
The months with the highest visibility are March, April and August (9km).
The month with the lowest visibility is November (7km).
