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
Weather in September
Temperature
As September commences, the average high-temperature subtly reduces, transitioning from a warm 23.3°C (73.9°F) in August to an enjoyable 19.5°C (67.1°F). During the month of September, an average temperature of 11.2°C (52.2°F) is noted during the nights.Humidity
The average relative humidity in September in Londerzeel is 78%.Rainfall
In Londerzeel, in September, it is raining for 7.7 days, with typically 10mm (0.39") of accumulated precipitation. Throughout the year, there are 118.8 rainfall days, and 171mm (6.73") of precipitation is accumulated.Snowfall
In Londerzeel, snow does not fall in April through October.Daylight
In Londerzeel, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 06:57 and sunset at 20:28. On the last day of September, in Londerzeel, sunrise is at 07:42 and sunset at 19:22 CEST.
Sunshine
In Londerzeel, the average sunshine in September is 7.4h.UV index
In September, the average daily maximum UV index in Londerzeel is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What are the temperatures in Londerzeel in September?
What is the average humidity in September in Londerzeel?
How many days does it rain in September in Londerzeel?
When it does not snow in Londerzeel?
What is the average length of the day in September in Londerzeel?
When is the sunrise / sunset in September in Londerzeel?
How long on average sun shines in September in Londerzeel?
How high is the UV index in September in Londerzeel?
Average temperature in September
Londerzeel, Belgium
- Average high temperature in September: 19.5°C
The warmest month (with the highest average high temperature) is July (23.4°C).
The month with the lowest average high temperature is January (5.4°C).
- Average low temperature in September: 11.2°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (1.3°C).
Average pressure in September
Londerzeel, 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 (1012.3mbar).
Average wind speed in September
Londerzeel, Belgium
- Average wind speed in September: 12km/h
The windiest month (with the highest average wind speed) is December (17.8km/h).
The calmest month (with the lowest average wind speed) is August (11.9km/h).
Average humidity in September
Londerzeel, Belgium
- Average humidity in September: 78%
The month with the highest relative humidity is December (87%).
The months with the lowest relative humidity are April, July and August (74%).
Average rainfall in September
Londerzeel, Belgium
- Average rainfall in September: 10mm
The wettest month (with the highest rainfall) is June (19mm).
The driest month (with the least rainfall) is April (9mm).
Average rainfall days in September
Londerzeel, Belgium
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is June (12.1 days).
The months with the least rainy days are February and September (7.7 days).
Average snowfall in September
Londerzeel, Belgium
- Average snowfall in September: 0mm
The month with the highest snowfall is January (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Londerzeel, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.5 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
Londerzeel, 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 2min
The months with the most sunshine are June and July (Average sunshine: 8h and 48min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Londerzeel, Belgium
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is June (14.3 days).
Average UV index in September
Londerzeel, 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
Londerzeel, Belgium
- Average cloud cover in September: 45
The month with the most cloud cover is December (Cloud cover 64).
The months with the least cloud cover are April and August (Cloud cover 43).
Average visibility in September
Londerzeel, Belgium
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Londerzeel, Belgium
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