September weather forecast and climate
Delle, Belgium

Weather in September

September, the first month of the autumn, in Delle, is still a comfortable month, with average temperature fluctuating between 11°C (51.8°F) and 19.4°C (66.9°F).

Temperature

In Delle, Belgium, the average high-temperature in September slightly decreases, from a moderately hot 23.1°C (73.6°F) in August, to a comfortable 19.4°C (66.9°F). In Delle, the average low-temperature is 11°C (51.8°F).

Humidity

In September, the average relative humidity in Delle is 79%.

Rainfall

The month with the least rainfall in Delle 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 Delle.

Daylight

In September, the average length of the day in Delle is 12.6h.

Sunshine

The average sunshine in Delle, Belgium, is 7.7h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Delle?

In September, in Delle, the average high-temperature is 19.4°C (66.9°F), and the average low-temperature is 11°C (51.8°F).

What is the average humidity in September in Delle?

The average relative humidity in September in Delle, Belgium, is 79%.

How much does it rain in Delle in September?

In Delle, during September, the rain falls for 8.5 days and regularly aggregates up to 16mm (0.63") of precipitation.

What is the driest month in Delle?

September is the month with the least rainfall in Delle, Belgium. Rain falls for 8.5 days and accumulates 16mm (0.63") of precipitation.

When it does not snow in Delle?

In Delle snow does not fall in April through October.

How many hours of daylight does Delle have in September?

In September, the average length of the day in Delle is 12.6h.

How long on average sun shines in September in Delle?

The average sunshine in September is 7.7h.

What is the UV index intensity in September in Delle?

The average daily maximum UV index in September in Delle is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Delle, Belgium

Average temperature in September - Delle, 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).

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Average pressure in September
Delle, Belgium

Average pressure in September - Delle, 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).

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Average wind speed in September
Delle, Belgium

Average wind speed in September - Delle, 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).

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Average humidity in September
Delle, Belgium

Average humidity in September - Delle, 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%).

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Average rainfall in September
Delle, Belgium

Average rainfall in September - Delle, 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).

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Average rainfall days in September
Delle, Belgium

Average rainfall days in September - Delle, 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).

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Average snowfall in September
Delle, Belgium

Average snowfall in September - Delle, Belgium
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (41mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Delle, Belgium

Average snowfall days in September - Delle, Belgium
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (5 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Delle, Belgium

Average daylight in September / Average sunshine in September - Delle, Belgium
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.4h).
The month with the shortest days is December (Average daylight: 8h).

  • Average sunshine in September: 7.7h

The month with the most sunshine is July (Average sunshine: 9.2h).
The month with the least sunshine is December (Average sunshine: 3.8h).

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Average sunshine days in September
Delle, Belgium

Average sunshine days in September - Delle, 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).

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Average UV index in September
Delle, Belgium

Average UV index in September - Delle, Belgium
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Delle, Belgium

Average cloud cover in September - Delle, Belgium
  • Average cloud cover in September: 42

The month with the most cloud cover is December (Cloud cover 62).
Months with the least cloud cover are April and August (Cloud cover 41).

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Average visibility in September
Delle, Belgium

Average visibility in September - Delle, Belgium
  • Average visibility in September: 9km

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).

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