Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a warm 23.1°C (73.6°F) in August to an enjoyable 19.5°C (67.1°F). The mean low-temperature during September nights in Aartselaar is a cool 11.5°C (52.7°F).Humidity
In September, the average relative humidity in Aartselaar, Belgium, is 78%.Rainfall
In September, the rain falls for 11.7 days. Throughout September, 22mm (0.87") of precipitation is accumulated. In Aartselaar, Belgium, during the entire year, the rain falls for 179.3 days and collects up to 449mm (17.68") of precipitation.Snowfall
In Aartselaar, snow does not fall in April through October.Daylight
In Aartselaar, the average length of the day in September is 12h and 38min.On the first day of September in Aartselaar, Belgium, sunrise is at 06:56 and sunset at 20:28. On the last day of the month, sunrise is at 07:42 and sunset at 19:22 CEST.
Sunshine
In Aartselaar, the average sunshine in September is 7.6h.UV index
In September, the average daily maximum UV index in Aartselaar is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Exercise prevention - Warding off sunburn is urged. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Aartselaar?
What is the average humidity in September in Aartselaar?
How much does it rain in Aartselaar in September?
When it does not snow in Aartselaar?
How many hours of daylight does Aartselaar have in September?
When is the sunrise / sunset in September in Aartselaar?
How many hours of sunshine does Aartselaar have in September?
What is the UV index intensity in September in Aartselaar?
Average temperature in September
Aartselaar, Belgium
- Average high temperature in September: 19.5°C
The warmest months (with the highest average high temperature) are July and August (23.1°C).
The month with the lowest average high temperature is January (5.4°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (14.3°C).
The coldest months (with the lowest average low temperature) are January and February (1.6°C).
Average pressure in September
Aartselaar, Belgium
- Average pressure in September: 1017.4mbar
The month with the highest atmospheric pressure is September (1017.4mbar).
The month with the lowest atmospheric pressure is November (1012.2mbar).
Average wind speed in September
Aartselaar, Belgium
- Average wind speed in September: 11.8km/h
The windiest month (with the highest average wind speed) is December (17.2km/h).
The calmest month (with the lowest average wind speed) is August (11.6km/h).
Average humidity in September
Aartselaar, Belgium
- Average humidity in September: 78%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Aartselaar, Belgium
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is December (57mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Aartselaar, Belgium
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is December (18.7 days).
The month with the least rainy days is September (11.7 days).
Average snowfall in September
Aartselaar, Belgium
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (31mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Aartselaar, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.3 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
Aartselaar, Belgium
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is June (Average sunshine: 9h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 42min).
Average sunshine days in September
Aartselaar, Belgium
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is September (15.8 days).
The month with the least sunshine days is December (8.2 days).
Average UV index in September
Aartselaar, 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
Aartselaar, Belgium
- Average cloud cover in September: 44
The month with the most cloud cover is December (Cloud cover 63).
The months with the least cloud cover are April and August (Cloud cover 41).
Average visibility in September
Aartselaar, 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).
