September weather forecastHeverlee, Belgium
September
Weather in September
September, the first month of the autumn in Heverlee, is also an enjoyable month, with temperature in the range of an average high of 19.4°C (66.9°F) and an average low of 11°C (51.8°F).Temperature
September heralds a minor drop in average high-temperature, sliding from August's warm 23.1°C (73.6°F) to a refreshing 19.4°C (66.9°F). During the month of September, the nighttime temperature falls to an average of 11°C (51.8°F).Humidity
In Heverlee, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall in Heverlee is September, when the rain falls for 8.5 days and typically collects 16mm (0.63") of precipitation.Snowfall
April through October are months without snowfall in Heverlee.Daylight
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, in Heverlee, sunrise is at 07:40 and sunset at 19:21 CEST.
Sunshine
In September, the average sunshine in Heverlee is 7.7h.UV index
In September, the average daily maximum UV index in Heverlee is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Undertake precautions - Obligation exists to protect against skin and eye damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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
Heverlee, 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).
