September weather forecast and climate
La Rosière, Belgium

Weather in September

The first month of the autumn, September, is still a comfortable month in La Rosière, Belgium, with average temperature ranging between max 18.7°C (65.7°F) and min 9.4°C (48.9°F).

Temperature

In September, the average high-temperature marginally drops, from a pleasant 22.3°C (72.1°F) in August, to a comfortable 18.7°C (65.7°F). The average low-temperature, in La Rosière, is 9.4°C (48.9°F).

Humidity

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

Rainfall

In La Rosière, Belgium, during 13 rainfall days, 47mm (1.85") of precipitation is typically accumulated. Throughout the year, in La Rosière, there are 179.8 rainfall days, and 618mm (24.33") of precipitation is accumulated.

Snowfall

In La Rosière snow does not fall in May through October.

Daylight

The average length of the day in September is 12.6h.

Sunshine

The average sunshine in La Rosière is 7.6h.

UV index

In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 La Rosière?

In September, in La Rosière, the average high-temperature is 18.7°C (65.7°F), and the average low-temperature is 9.4°C (48.9°F).

What is the average humidity in September in La Rosière?

The average relative humidity in September is 80%.

How much does it rain in La Rosière in September?

In La Rosière, in September, during 13 rainfall days, 47mm (1.85") of precipitation is typically accumulated.

When it does not snow in La Rosière?

In La Rosière snow does not fall in May through October.

What is the average length of the day in September in La Rosière?

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

How long on average sun shines in September in La Rosière?

In September, the average sunshine is 7.6h.

How high is the UV index in September in La Rosière?

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

Average temperature in September
La Rosière, Belgium

Average temperature in September - La Rosière, Belgium
  • Average high temperature in September: 18.7°C

The warmest months (with the highest average high temperature) are July and August (22.3°C).
The month with the lowest average high temperature is January (3.6°C).

  • Average low temperature in September: 9.4°C

Months with the highest average low temperature are July and August (12.3°C).
The coldest month (with the lowest average low temperature) is January (-0.8°C).

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Average pressure in September
La Rosière, Belgium

Average pressure in September - La Rosière, Belgium
  • Average pressure in September: 1017.7mbar

The month with the highest atmospheric pressure is December (1018.2mbar).
The month with the lowest atmospheric pressure is November (1013.9mbar).

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Average wind speed in September
La Rosière, Belgium

Average wind speed in September - La Rosière, Belgium
  • Average wind speed in September: 10.5km/h

The windiest month (with the highest average wind speed) is February (16.1km/h).
The calmest month (with the lowest average wind speed) is August (10km/h).

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Average humidity in September
La Rosière, Belgium

Average humidity in September - La Rosière, Belgium
  • Average humidity in September: 80%

The month with the highest relative humidity is December (92%).
Months with the lowest relative humidity are April and August (78%).

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Average rainfall in September
La Rosière, Belgium

Average rainfall in September - La Rosière, Belgium
  • Average rainfall in September: 47mm

The wettest month (with the highest rainfall) is December (74mm).
The driest month (with the least rainfall) is April (33mm).

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Average rainfall days in September
La Rosière, Belgium

Average rainfall days in September - La Rosière, Belgium
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (11.9 days).

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Average snowfall in September
La Rosière, Belgium

Average snowfall in September - La Rosière, Belgium
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (62mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

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Average snowfall days in September
La Rosière, Belgium

Average snowfall days in September - La Rosière, Belgium
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.6 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
La Rosière, Belgium

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

The month with the longest days is June (Average daylight: 16.2h).
The month with the shortest days is December (Average daylight: 8.2h).

  • Average sunshine in September: 7.6h

The month with the most sunshine is July (Average sunshine: 9.2h).
The month with the least sunshine is December (Average sunshine: 3h).

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Average sunshine days in September
La Rosière, Belgium

Average sunshine days in September - La Rosière, Belgium
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is September (14.9 days).
Months with the least sunshine days are June, November and December (9.6 days).

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Average UV index in September
La Rosière, Belgium

Average UV index in September - La Rosière, Belgium
  • Average UV index in September: 3

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
La Rosière, Belgium

Average cloud cover in September - La Rosière, Belgium
  • Average cloud cover in September: 42

The month with the most cloud cover is December (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 40).

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Average visibility in September
La Rosière, Belgium

Average visibility in September - La Rosière, Belgium
  • Average visibility in September: 8km

Months with the highest visibility are March, April and August (9km).
The month with the lowest visibility is November (7km).

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