September weather forecastLeuven, Belgium
September
Weather in September
Moving into September, Leuven starts to experience a gradual cooldown from the height of summer. With daytime highs no more than 19.4°C (66.9°F), it marks a distinct transition from August. Cloud cover continues to increase, hinting at the upcoming autumn season. Still, the number of sunshine days holds steady, revealing that sunny days outnumber cloudy ones. Finally, with a 4 UV index, late summer sunbathing in Leuven's parks becomes more viable.Temperature
The arrival of September signals a subtle shift in temperature, down from a warm 23.1°C (73.6°F) in August to a refreshing 19.4°C (66.9°F). The average low-temperature of 11°C (51.8°F) is witnessed during September.Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 8.5 days and accumulates 16mm (0.63") of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Leuven, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 06:55 and sunset at 20:26. On the last day of September, sunrise is at 07:40 and sunset at 19:21 CEST.
Sunshine
In Leuven, the average sunshine in September is 7.7h.UV index
In Leuven, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Leuven, Belgium
- Average high temperature in September: 19.4°C
The warmest month (with the highest average high temperature) is July (23.2°C).
The month with the lowest average high temperature is January (4.9°C).
- Average low temperature in September: 11°C
The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is January (1°C).
Average pressure in September
Leuven, Belgium
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1012.5mbar).
Average wind speed in September
Leuven, Belgium
- Average wind speed in September: 11.9km/h
The windiest month (with the highest average wind speed) is December (18.1km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).
Average humidity in September
Leuven, Belgium
- Average humidity in September: 79%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Leuven, Belgium
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is December (57mm).
The driest month (with the least rainfall) is September (16mm).
Average rainfall days in September
Leuven, Belgium
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is December (18.5 days).
The month with the least rainy days is September (8.5 days).
Average snowfall in September
Leuven, Belgium
- Average snowfall in September: 0mm
The month with the highest snowfall is February (41mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Leuven, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Leuven, Belgium
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 7h and 42min
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 48min).
Average sunshine days in September
Leuven, Belgium
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is September (20.1 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in September
Leuven, Belgium
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Leuven, Belgium
- Average cloud cover in September: 42
The month with the most cloud cover is December (Cloud cover 62).
The months with the least cloud cover are April and August (Cloud cover 41).
Average visibility in September
Leuven, Belgium
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
