September weather forecast and climate
Gravelinne, Belgium

Weather in September

The first month of the autumn, September, is still a comfortable month in Gravelinne, Belgium, with average temperature varying between 19.2°C (66.6°F) and 10.3°C (50.5°F).

Temperature

In Gravelinne, the average high-temperature slightly decreases, from an agreeable 22.5°C (72.5°F) in August, to an enjoyable 19.2°C (66.6°F). The average low-temperature, is 10.3°C (50.5°F).

Humidity

In September, the average relative humidity in Gravelinne is 80%.

Rainfall

The month with the least rainfall in Gravelinne is September when the rain falls for 10.5 days and typically collects 22mm (0.87") of precipitation.

Snowfall

In Gravelinne snow does not fall in April through September.

Daylight

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

Sunshine

The average sunshine is 7.5h.

UV index

The average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV rays for the ordinary person.
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. 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.
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FAQ

What is the temperature in September in Gravelinne?

In Gravelinne, Belgium, in September, the average high-temperature is 19.2°C (66.6°F), and the average low-temperature is 10.3°C (50.5°F).

What is the average humidity in September in Gravelinne?

In Gravelinne, the average relative humidity in September is 80%.

How many days does it rain in September in Gravelinne?

In Gravelinne, in September, it is raining for 10.5 days, with typically 22mm (0.87") of accumulated precipitation.

What is the driest month in Gravelinne?

The month with the least rainfall is September when the rain falls for 10.5 days and typically collects 22mm (0.87") of precipitation.

Does it snow in Gravelinne in September?

In Gravelinne, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Gravelinne?

In Gravelinne snow does not fall in April through September.

What is the average length of the day in September in Gravelinne?

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

How long on average sun shines in September in Gravelinne?

The average sunshine in September in Gravelinne, Belgium, is 7.5h.

What is the UV index intensity in September in Gravelinne?

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.

Average temperature in September
Gravelinne, Belgium

Average temperature in September - Gravelinne, Belgium
  • Average high temperature in September: 19.2°C

The warmest month (with the highest average high temperature) is July (22.6°C).
The month with the lowest average high temperature is January (4.9°C).

  • Average low temperature in September: 10.3°C

The month with the highest average low temperature is August (13.1°C).
The coldest months (with the lowest average low temperature) are January and February (0.7°C).

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Average pressure in September
Gravelinne, Belgium

Average pressure in September - Gravelinne, Belgium
  • Average pressure in September: 1017.6mbar

The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1012.7mbar).

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Average wind speed in September
Gravelinne, Belgium

Average wind speed in September - Gravelinne, Belgium
  • Average wind speed in September: 12.2km/h

The windiest month (with the highest average wind speed) is December (18.9km/h).
The calmest month (with the lowest average wind speed) is August (11.8km/h).

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Average humidity in September
Gravelinne, Belgium

Average humidity in September - Gravelinne, Belgium
  • Average humidity in September: 80%

The month with the highest relative humidity is December (89%).
Months with the lowest relative humidity are July and August (77%).

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Average rainfall in September
Gravelinne, Belgium

Average rainfall in September - Gravelinne, Belgium
  • Average rainfall in September: 22mm

The wettest month (with the highest rainfall) is December (63mm).
The driest month (with the least rainfall) is September (22mm).

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Average rainfall days in September
Gravelinne, Belgium

Average rainfall days in September - Gravelinne, Belgium
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is September (10.5 days).

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Average snowfall in September
Gravelinne, Belgium

Average snowfall in September - Gravelinne, 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 and September (0mm).

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Average snowfall days in September
Gravelinne, Belgium

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

The month with the highest number of snowfall days is February (4.3 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 16.3h).
The month with the shortest days is December (Average daylight: 8.1h).

  • Average sunshine in September: 7.5h

Months with the most sunshine are July and August (Average sunshine: 8.8h).
Months with the least sunshine are January and December (Average sunshine: 3.6).

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Average sunshine days in September
Gravelinne, Belgium

Average sunshine days in September - Gravelinne, Belgium
  • Average sunshine days in September: 17.9 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is December (10.8 days).

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Average UV index in September
Gravelinne, Belgium

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

Months with the highest UV index are June and July (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
Gravelinne, Belgium

Average cloud cover in September - Gravelinne, Belgium
  • Average cloud cover in September: 44

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 42).

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Average visibility in September
Gravelinne, Belgium

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

Months with the highest visibility are February, March, April, May, June, July, August, September and October (9km).
Months with the lowest visibility are January, November and December (8km).

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