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
In September, the average high-temperature marginally drops from a warm 23.2°C (73.8°F) in August to a refreshing 19.8°C (67.6°F). In the month of September, Heldergem records a consistent average low-temperature of 11.2°C (52.2°F).Humidity
In Heldergem, Belgium, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 9.8 days. Throughout September, 21mm (0.83") of precipitation is accumulated. In Heldergem, during the entire year, the rain falls for 169.4 days and collects up to 421mm (16.57") of precipitation.Snowfall
In Heldergem, snow does not fall in April through October.Daylight
The average length of the day in September in Heldergem is 12h and 38min.On the first day of the month, sunrise is at 06:58 and sunset at 20:29. On the last day of September, sunrise is at 07:43 and sunset at 19:24 CEST.
Sunshine
In Heldergem, the average sunshine in September is 7.2h.UV index
In Heldergem, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 4 during September leads to these advisories:
Exercise prevention - Warding off sunburn is urged. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What is the usual temperature for Heldergem in September?
What is the average humidity in September in Heldergem?
How much does it rain in Heldergem in September?
When it does not snow in Heldergem?
What is the average length of the day in September in Heldergem?
When are sunrise and sunset in September in Heldergem?
How many hours of sunshine does Heldergem have in September?
What is the UV index intensity in September in Heldergem?
Average temperature in September
Heldergem, 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
Heldergem, 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
Heldergem, 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
Heldergem, 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
Heldergem, 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
Heldergem, 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
Heldergem, 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
Heldergem, 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
Heldergem, 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 1min
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
Heldergem, 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
Heldergem, 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
Heldergem, 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
Heldergem, 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).
Heldergem, Belgium
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