September weather forecastLongeau, Belgium
September
Weather in September
September, the first month of the autumn in Longeau, is also an enjoyable month, with an average temperature varying between 18°C (64.4°F) and 9°C (48.2°F).Temperature
As September begins, there is a minor decrease in the average high-temperature, softly falling from a pleasant 21.8°C (71.2°F) in August to an enjoyable 18°C (64.4°F). Longeau witnesses an average low-temperature of 9°C (48.2°F) throughout the month of September.Humidity
The average relative humidity in September is 82%.Rainfall
In Longeau, in September, it is raining for 12.9 days, with typically 40mm (1.57") of accumulated precipitation. Throughout the year, in Longeau, there are 179.7 rainfall days, and 616mm (24.25") of precipitation is accumulated.Snowfall
June through September are months without snowfall in Longeau.Daylight
In Longeau, the average length of the day in September is 12h and 36min.On the first day of September in Longeau, Belgium, sunrise is at 06:53 and sunset at 20:19. On the last day of the month, sunrise is at 07:35 and sunset at 19:17 CEST.
Sunshine
In September, the average sunshine in Longeau is 7.9h.UV index
In September, the average daily maximum UV index in Longeau is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Take precautions - Protection against sun damage is advised. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Longeau, Belgium
- Average high temperature in September: 18°C
The warmest months (with the highest average high temperature) are July and August (21.8°C).
The month with the lowest average high temperature is January (3°C).
- Average low temperature in September: 9°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is January (-1.1°C).
Average pressure in September
Longeau, Belgium
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is December (1018.1mbar).
The month with the lowest atmospheric pressure is November (1013.9mbar).
Average wind speed in September
Longeau, Belgium
- Average wind speed in September: 10.4km/h
The windiest month (with the highest average wind speed) is February (16km/h).
The calmest month (with the lowest average wind speed) is August (9.8km/h).
Average humidity in September
Longeau, Belgium
- Average humidity in September: 82%
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
Longeau, Belgium
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is December (73mm).
The driest month (with the least rainfall) is April (34mm).
Average rainfall days in September
Longeau, Belgium
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (11.6 days).
Average snowfall in September
Longeau, Belgium
- Average snowfall in September: 0mm
The months with the highest snowfall are January and December (80mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Longeau, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Longeau, Belgium
- 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 54min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 0min).
Average sunshine days in September
Longeau, Belgium
- Average sunshine days in September: 14.7 days
The months with the most sunshine days are April and September (14.7 days).
The month with the least sunshine days is December (9 days).
Average UV index in September
Longeau, Belgium
- Average UV index in September: 3
The month with the highest UV index is 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
Longeau, Belgium
- 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 39).
Average visibility in September
Longeau, Belgium
- 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).
