September weather forecastBorchtlombeek, Belgium
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Borchtlombeek, Belgium, with an average temperature ranging between min 11.2°C (52.2°F) and max 19.8°C (67.6°F).Temperature
Borchtlombeek, Belgium, in September experiences a gentle temperature dip, with average high-temperatures reducing from a moderately hot 23.2°C (73.8°F) in August to a comfortable 19.8°C (67.6°F). Borchtlombeek, in September, witnesses an average low-temperature of 11.2°C (52.2°F).Humidity
In Borchtlombeek, the average relative humidity in September is 78%.Rainfall
In Borchtlombeek, Belgium, in September, it is raining for 9.8 days, with typically 21mm (0.83") of accumulated precipitation. Throughout the year, there are 169.4 rainfall days, and 421mm (16.57") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Borchtlombeek is 12h and 38min.On the first day of September in Borchtlombeek, sunrise is at 06:58 and sunset at 20:28. On the last day of the month, sunrise is at 07:43 and sunset at 19:23 CEST.
Sunshine
The average sunshine in September in Borchtlombeek is 7.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Borchtlombeek, Belgium
- Average high temperature in September: 19.8°C
The warmest month (with the highest average high temperature) is July (23.3°C).
The month with the lowest average high temperature is January (5.5°C).
- Average low temperature in September: 11.2°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (1.3°C).
Average pressure in September
Borchtlombeek, Belgium
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is September (1017.3mbar).
The month with the lowest atmospheric pressure is November (1012.2mbar).
Average wind speed in September
Borchtlombeek, Belgium
- Average wind speed in September: 12.1km/h
The windiest month (with the highest average wind speed) is December (17.3km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).
Average humidity in September
Borchtlombeek, Belgium
- Average humidity in September: 78%
The month with the highest relative humidity is December (88%).
The months with the lowest relative humidity are April, July and August (75%).
Average rainfall in September
Borchtlombeek, Belgium
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is December (59mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Borchtlombeek, Belgium
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is December (17.9 days).
The month with the least rainy days is September (9.8 days).
Average snowfall in September
Borchtlombeek, Belgium
- Average snowfall in September: 0mm
The month with the highest snowfall is January (36mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Borchtlombeek, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.4 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
Borchtlombeek, 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 12min
The month with the most sunshine is June (Average sunshine: 9h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Borchtlombeek, Belgium
- Average sunshine days in September: 18.7 days
The month with the most sunshine days is September (18.7 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in September
Borchtlombeek, 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
Borchtlombeek, Belgium
- Average cloud cover in September: 45
The month with the most cloud cover is December (Cloud cover 64).
The month with the least cloud cover is April (Cloud cover 43).
Average visibility in September
Borchtlombeek, Belgium
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September and October (9km).
The months with the lowest visibility are January, November and December (8km).
