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
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a pleasant 22.5°C (72.5°F) in August to an enjoyable 18.8°C (65.8°F). In September, the average low-temperature records at a chilly 9.8°C (49.6°F) during the nights.Humidity
In September, the average relative humidity in Sart-Saint-Laurent, Belgium, is 80%.Rainfall
In Sart-Saint-Laurent, in September, it is raining for 12.9 days, with typically 35mm (1.38") of accumulated precipitation. Throughout the year, in Sart-Saint-Laurent, there are 179.6 rainfall days, and 508mm (20") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 37min.On the first day of September in Sart-Saint-Laurent, sunrise is at 06:56 and sunset at 20:25. On the last day of the month, sunrise is at 07:40 and sunset at 19:21 CEST.
Sunshine
The average sunshine in September is 7.5h.UV index
In Sart-Saint-Laurent, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What are September temperatures in Sart-Saint-Laurent?
What is the average humidity in September in Sart-Saint-Laurent?
How many days does it rain in September in Sart-Saint-Laurent?
When it does not snow in Sart-Saint-Laurent?
How many hours of daylight does Sart-Saint-Laurent have in September?
When is the sunrise / sunset in September in Sart-Saint-Laurent?
How many hours of sunshine does Sart-Saint-Laurent have in September?
What is the UV index intensity in September in Sart-Saint-Laurent?
Average temperature in September
Sart-Saint-Laurent, Belgium
- Average high temperature in September: 18.8°C
The warmest month (with the highest average high temperature) is August (22.5°C).
The month with the lowest average high temperature is January (4.3°C).
- Average low temperature in September: 9.8°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (-0.1°C).
Average pressure in September
Sart-Saint-Laurent, 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 (1013mbar).
Average wind speed in September
Sart-Saint-Laurent, Belgium
- Average wind speed in September: 11.7km/h
The windiest month (with the highest average wind speed) is December (18.2km/h).
The calmest month (with the lowest average wind speed) is August (11.3km/h).
Average humidity in September
Sart-Saint-Laurent, Belgium
- Average humidity in September: 80%
The months with the highest relative humidity are January and December (89%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
Sart-Saint-Laurent, Belgium
- Average rainfall in September: 35mm
The wettest month (with the highest rainfall) is December (56mm).
The driest month (with the least rainfall) is April (28mm).
Average rainfall days in September
Sart-Saint-Laurent, Belgium
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (12 days).
Average snowfall in September
Sart-Saint-Laurent, Belgium
- Average snowfall in September: 0mm
The month with the highest snowfall is January (40mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Sart-Saint-Laurent, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.5 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
Sart-Saint-Laurent, Belgium
- Average daylight in September: 12h and 4min
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 6min).
- Average sunshine in September: 7h and 3min
The months with the most sunshine are July and August (Average sunshine: 8h and 54min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Sart-Saint-Laurent, Belgium
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is October (15.3 days).
The month with the least sunshine days is June (10.2 days).
Average UV index in September
Sart-Saint-Laurent, Belgium
- Average UV index in September: 4
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
Sart-Saint-Laurent, Belgium
- Average cloud cover in September: 44
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 43).
Average visibility in September
Sart-Saint-Laurent, Belgium
- Average visibility in September: 8km
The months with the highest visibility are February, March, April, May, June, July, August and October (9km).
The months with the lowest visibility are January, September, November and December (8km).
Sart-Saint-Laurent, Belgium
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