May weather forecast and climate
Hoeilaart, Belgium

Weather in May

May, the last month of the spring, in Hoeilaart, is an enjoyable month, with average temperature varying between 17.5°C (63.5°F) and 8.2°C (46.8°F).

Temperature

In Hoeilaart, the average high-temperature in May is essentially the same as in April - a comfortable 17.5°C (63.5°F). In Hoeilaart, the average low-temperature is 8.2°C (46.8°F).

Humidity

The average relative humidity in May is 77%.

Rainfall

In Hoeilaart, during May, the rain falls for 16.8 days and regularly aggregates up to 39mm (1.54") of precipitation. In Hoeilaart, during the entire year, the rain falls for 179.3 days and collects up to 469mm (18.46") of precipitation.

Snowfall

April through September are months without snowfall in Hoeilaart.

Daylight

The average length of the day in May is 15.5h.

Sunshine

In May, the average sunshine in Hoeilaart, Belgium, is 8.4h.

UV index

In Hoeilaart, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 4 in May interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. 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 May in Hoeilaart?

The average high-temperature, in May, is 17.5°C (63.5°F), while the average low-temperature is 8.2°C (46.8°F).

What is the average humidity in May in Hoeilaart?

The average relative humidity in May is 77%.

How many days does it rain in May in Hoeilaart?

In May, in Hoeilaart, Belgium, the rain falls for 16.8 days. Throughout May, 39mm (1.54") of precipitation is accumulated.

When it does not snow in Hoeilaart?

April through September are months without snowfall in Hoeilaart, Belgium.

What is the average length of the day in May in Hoeilaart?

The average length of the day in May in Hoeilaart, Belgium, is 15.5h.

How many hours of sunshine does Hoeilaart have in May?

In Hoeilaart, the average sunshine in May is 8.4h.

How high is the UV index in May in Hoeilaart?

In May, the average daily maximum UV index in Hoeilaart, Belgium, is 4. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in May
Hoeilaart, Belgium

Average temperature in May - Hoeilaart, Belgium
  • Average high temperature in May: 17.5°C

The warmest month (with the highest average high temperature) is August (23.1°C).
The month with the lowest average high temperature is January (5°C).

  • Average low temperature in May: 8.2°C

The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (1°C).

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Average pressure in May
Hoeilaart, Belgium

Average pressure in May - Hoeilaart, Belgium
  • Average pressure in May: 1016.5mbar

The month with the highest atmospheric pressure is September (1017.4mbar).
The month with the lowest atmospheric pressure is November (1012.5mbar).

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Average wind speed in May
Hoeilaart, Belgium

Average wind speed in May - Hoeilaart, Belgium
  • Average wind speed in May: 12.5km/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 May
Hoeilaart, Belgium

Average humidity in May - Hoeilaart, Belgium
  • Average humidity in May: 77%

The month with the highest relative humidity is December (88%).
Months with the lowest relative humidity are April, July and August (75%).

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Average rainfall in May
Hoeilaart, Belgium

Average rainfall in May - Hoeilaart, Belgium
  • Average rainfall in May: 39mm

The wettest month (with the highest rainfall) is December (54mm).
The driest month (with the least rainfall) is April (25mm).

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Average rainfall days in May
Hoeilaart, Belgium

Average rainfall days in May - Hoeilaart, Belgium
  • Average rainfall days in May: 16.8 days

The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is February (11.6 days).

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Average snowfall in May
Hoeilaart, Belgium

Average snowfall in May - Hoeilaart, Belgium
  • Average snowfall in May: 0mm

The month with the highest snowfall is January (34mm).
Months with the least snowfall are April, May, June, July, August and September (0mm).

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Average snowfall days in May
Hoeilaart, Belgium

Average snowfall days in May - Hoeilaart, Belgium
  • Average snowfall days in May: 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 May /
Average sunshine in May
Hoeilaart, Belgium

Average daylight in May / Average sunshine in May - Hoeilaart, Belgium
  • Average daylight in May: 15.5h

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 May: 8.4h

Months with the most sunshine are July and August (Average sunshine: 9h).
The month with the least sunshine is December (Average sunshine: 3.6h).

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Average sunshine days in May
Hoeilaart, Belgium

Average sunshine days in May - Hoeilaart, Belgium
  • Average sunshine days in May: 11.6 days

The month with the most sunshine days is September (14.6 days).
Months with the least sunshine days are February, August and December (10.9 days).

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Average UV index in May
Hoeilaart, Belgium

Average UV index in May - Hoeilaart, Belgium
  • Average UV index in May: 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 May
Hoeilaart, Belgium

Average cloud cover in May - Hoeilaart, Belgium
  • Average cloud cover in May: 45

The month with the most cloud cover is December (Cloud cover 62).
Months with the least cloud cover are April and August (Cloud cover 42).

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Average visibility in May
Hoeilaart, Belgium

Average visibility in May - Hoeilaart, Belgium
  • Average visibility in May: 9km

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

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