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 September's onset, the weather reveals a slight temperature decrease, transitioning from a pleasant 21.7°C (71.1°F) in August to a refreshing 17.5°C (63.5°F). Attert reports a consistent average low-temperature of 8.5°C (47.3°F) throughout September nights.Humidity
In September, the average relative humidity is 82%.Rainfall
In Attert, Belgium, in September, it is raining for 13.1 days, with typically 39mm (1.54") of accumulated precipitation. Throughout the year, there are 190.3 rainfall days, and 626mm (24.65") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Attert is 12h and 36min.On the first day of September, sunrise is at 06:53 and sunset at 20:20. On the last day of the month, sunrise is at 07:36 and sunset at 19:17 CEST.
Sunshine
In Attert, Belgium, the average sunshine in September is 7.9h.UV index
The average daily maximum UV index in September in Attert, Belgium, is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: An average UV index of 3 in September transforms into this advice:
Take precautions - Protection against sun damage is advised. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the average September temperature in Attert?
What is the average humidity in September in Attert?
How much does it rain in Attert in September?
When it does not snow in Attert?
Does it snow in Attert in September?
How many hours of daylight does Attert have in September?
When are sunrise and sunset in September in Attert?
How long on average sun shines in September in Attert?
How high is the UV index in September in Attert?
Average temperature in September
Attert, Belgium
- Average high temperature in September: 17.5°C
The warmest month (with the highest average high temperature) is August (21.7°C).
The month with the lowest average high temperature is January (2.7°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is August (11.8°C).
The coldest month (with the lowest average low temperature) is January (-1.3°C).
Average pressure in September
Attert, Belgium
- Average pressure in September: 1017.9mbar
The month with the highest atmospheric pressure is December (1018mbar).
The month with the lowest atmospheric pressure is November (1013.9mbar).
Average wind speed in September
Attert, Belgium
- Average wind speed in September: 10.3km/h
The windiest month (with the highest average wind speed) is February (15.9km/h).
The calmest month (with the lowest average wind speed) is August (9.8km/h).
Average humidity in September
Attert, Belgium
- Average humidity in September: 82%
The month with the highest relative humidity is December (92%).
The months with the lowest relative humidity are April and August (79%).
Average rainfall in September
Attert, Belgium
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is December (70mm).
The driest month (with the least rainfall) is April (36mm).
Average rainfall days in September
Attert, Belgium
- Average rainfall days in September: 13.1 days
The months with the highest number of rainy days are June and July (19.1 days).
The month with the least rainy days is February (12.7 days).
Average snowfall in September
Attert, Belgium
- Average snowfall in September: 0mm
The month with the highest snowfall is January (78mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Attert, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Attert, Belgium
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 18min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).
Average sunshine days in September
Attert, Belgium
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is March (14.3 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in September
Attert, Belgium
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Attert, Belgium
- Average cloud cover in September: 43
The month with the most cloud cover is December (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Attert, Belgium
- Average visibility in September: 8km
The months with the highest visibility are March, April and August (9km).
The months with the lowest visibility are November and December (7km).
Attert, Belgium
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