September weather forecast and climate
Grandville, Belgium

Weather in September

September, the first month of the autumn, in Grandville, is also an enjoyable month, with average temperature fluctuating between 9.8°C (49.6°F) and 18.5°C (65.3°F).

Temperature

In September, the average high-temperature slightly decreases, from an agreeable 22.6°C (72.7°F) in August, to a comfortable 18.5°C (65.3°F). The average low-temperature, in September, is 9.8°C (49.6°F).

Humidity

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

Rainfall

In Grandville, it is raining for 11.6 days, with typically 26mm (1.02") of accumulated precipitation. In Grandville, during the entire year, the rain falls for 176.9 days and collects up to 484mm (19.06") of precipitation.

Snowfall

In Grandville, Belgium, snow does not fall in April through October.

Daylight

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

Sunshine

In September, the average sunshine in Grandville is 8h.

UV index

In September, the average daily maximum UV index in Grandville is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Grandville?

In September, in Grandville, Belgium, the average high-temperature is 18.5°C (65.3°F), and the average low-temperature is 9.8°C (49.6°F).

What is the average humidity in September in Grandville?

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

How much does it rain in Grandville in September?

In Grandville, Belgium, in September, during 11.6 rainfall days, 26mm (1.02") of precipitation is typically accumulated.

When it does not snow in Grandville?

In Grandville, Belgium, snow does not fall in April through October.

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

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

How long on average sun shines in September in Grandville?

In September, the average sunshine is 8h.

What is the UV index intensity in September in Grandville?

In Grandville, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Grandville, Belgium

Average temperature in September - Grandville, Belgium
  • Average high temperature in September: 18.5°C

The warmest months (with the highest average high temperature) are July and August (22.6°C).
The month with the lowest average high temperature is January (4.3°C).

  • Average low temperature in September: 9.8°C

The month with the highest average low temperature is August (13°C).
The coldest month (with the lowest average low temperature) is January (0°C).

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Average pressure in September
Grandville, Belgium

Average pressure in September - Grandville, 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 (1013mbar).

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Average wind speed in September
Grandville, Belgium

Average wind speed in September - Grandville, Belgium
  • Average wind speed in September: 11km/h

The windiest month (with the highest average wind speed) is December (17.2km/h).
The calmest month (with the lowest average wind speed) is August (10.7km/h).

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Average humidity in September
Grandville, Belgium

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

Months with the highest relative humidity are January and December (88%).
Months with the lowest relative humidity are April and August (77%).

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Average rainfall in September
Grandville, Belgium

Average rainfall in September - Grandville, Belgium
  • Average rainfall in September: 26mm

The wettest month (with the highest rainfall) is December (55mm).
The driest month (with the least rainfall) is April (24mm).

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Average rainfall days in September
Grandville, Belgium

Average rainfall days in September - Grandville, Belgium
  • Average rainfall days in September: 11.6 days

The month with the highest number of rainy days is August (17.8 days).
Months with the least rainy days are February and September (11.6 days).

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Average snowfall in September
Grandville, Belgium

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

The month with the highest snowfall is January (49mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Grandville, Belgium

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

The month with the highest number of snowfall days is January (5.4 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
Grandville, Belgium

Average daylight in September / Average sunshine in September - Grandville, 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: 8.1h).

  • Average sunshine in September: 8h

The month with the most sunshine is August (Average sunshine: 9.3h).
The month with the least sunshine is December (Average sunshine: 3.8h).

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Average sunshine days in September
Grandville, Belgium

Average sunshine days in September - Grandville, Belgium
  • Average sunshine days in September: 16 days

The month with the most sunshine days is September (16 days).
The month with the least sunshine days is December (10.6 days).

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Average UV index in September
Grandville, Belgium

Average UV index in September - Grandville, 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
Grandville, Belgium

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

The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 40).

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Average visibility in September
Grandville, Belgium

Average visibility in September - Grandville, Belgium
  • Average visibility in September: 8km

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

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