September weather forecastHeppen, Belgium
September
Weather in September
September, the first month of the autumn in Heppen, is still a refreshing month, with temperature in the range of an average low of 11°C (51.8°F) and an average high of 19.3°C (66.7°F).Temperature
September heralds a minor drop in average high-temperature, sliding from August's moderately hot 23.3°C (73.9°F) to a comfortable 19.3°C (66.7°F). During September, Heppen records an average temperature of 11°C (51.8°F) at night.Humidity
In September, the average relative humidity is 79%.Rainfall
In Heppen, during September, the rain falls for 12.7 days and regularly aggregates up to 27mm (1.06") of precipitation. In Heppen, during the entire year, the rain falls for 172.9 days and collects up to 469mm (18.46") of precipitation.Snowfall
April through October are months without snowfall in Heppen.Daylight
In Heppen, the average length of the day in September is 12h and 38min.On the first day of September in Heppen, Belgium, sunrise is at 06:53 and sunset at 20:24. On the last day of the month, sunrise is at 07:38 and sunset at 19:18 CEST.
Sunshine
The average sunshine in September in Heppen is 7.7h.UV index
In September, the average daily maximum UV index in Heppen is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Take necessary precautions - Protection from skin and eye injury is mandatory. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Heppen, Belgium
- Average high temperature in September: 19.3°C
The warmest month (with the highest average high temperature) is July (23.4°C).
The month with the lowest average high temperature is January (5°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 (1.2°C).
Average pressure in September
Heppen, 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 (1012.6mbar).
Average wind speed in September
Heppen, Belgium
- Average wind speed in September: 11.5km/h
The windiest month (with the highest average wind speed) is December (17.6km/h).
The calmest month (with the lowest average wind speed) is August (11.2km/h).
Average humidity in September
Heppen, Belgium
- Average humidity in September: 79%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Heppen, Belgium
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is August (53mm).
The driest month (with the least rainfall) is April (20mm).
Average rainfall days in September
Heppen, Belgium
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is August (18.6 days).
The month with the least rainy days is April (11.3 days).
Average snowfall in September
Heppen, Belgium
- Average snowfall in September: 0mm
The month with the highest snowfall is February (34mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Heppen, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.7 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
Heppen, Belgium
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 30min).
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 6min).
The month with the least sunshine is December (Average sunshine: 3h and 42min).
Average sunshine days in September
Heppen, Belgium
- Average sunshine days in September: 14.6 days
The months with the most sunshine days are March and April (16.6 days).
The months with the least sunshine days are June and July (9.8 days).
Average UV index in September
Heppen, 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
Heppen, Belgium
- Average cloud cover in September: 43
The month with the most cloud cover is December (Cloud cover 63).
The months with the least cloud cover are April and August (Cloud cover 41).
Average visibility in September
Heppen, Belgium
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
