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
With the onset of September, the average high-temperature subtly recedes from August's warm 23.1°C (73.6°F) to a refreshing 19.6°C (67.3°F). In the month of September, the temperature in Oud-Heverlee generally rests at an average low of 11.1°C (52°F).Humidity
The average relative humidity in September is 78%.Rainfall
In September, the rain falls for 9.2 days. Throughout September, 18mm (0.71") of precipitation is accumulated. Throughout the year, in Oud-Heverlee, there are 162.7 rainfall days, and 395mm (15.55") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 38min.On the first day of September in Oud-Heverlee, Belgium, sunrise is at 06:55 and sunset at 20:26. On the last day of the month, sunrise is at 07:41 and sunset at 19:21 CEST.
Sunshine
In September, the average sunshine is 7.6h.UV index
In Oud-Heverlee, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Frequently asked questions
What is the usual temperature for Oud-Heverlee in September?
What is the average humidity in September in Oud-Heverlee?
How many days does it rain in September in Oud-Heverlee?
When it does not snow in Oud-Heverlee?
What is the average length of the day in September in Oud-Heverlee?
When are sunrise and sunset in September in Oud-Heverlee?
How long on average sun shines in September in Oud-Heverlee?
What is the UV index intensity in September in Oud-Heverlee?
Average temperature in September
Oud-Heverlee, Belgium
- Average high temperature in September: 19.6°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: 11.1°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
Oud-Heverlee, 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 (1012.5mbar).
Average wind speed in September
Oud-Heverlee, Belgium
- Average wind speed in September: 12km/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
Oud-Heverlee, Belgium
- Average humidity in September: 78%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Oud-Heverlee, Belgium
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is December (57mm).
The driest month (with the least rainfall) is April (17mm).
Average rainfall days in September
Oud-Heverlee, Belgium
- Average rainfall days in September: 9.2 days
The month with the highest number of rainy days is December (18.5 days).
The month with the least rainy days is September (9.2 days).
Average snowfall in September
Oud-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
Oud-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
Oud-Heverlee, 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 0min).
- Average sunshine in September: 7h and 4min
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 36min).
Average sunshine days in September
Oud-Heverlee, Belgium
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is September (19.6 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in September
Oud-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
Oud-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
Oud-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).
Oud-Heverlee, Belgium
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