May weather forecast and climate
Mertenne, Belgium

Weather in May

The last month of the spring, May, is an enjoyable month in Mertenne, Belgium, with average temperature fluctuating between 16.4°C (61.5°F) and 6.9°C (44.4°F).

Temperature

In May, the average high-temperature is almost the same as in April - an enjoyable 16.4°C (61.5°F). In Mertenne, in May, the average low-temperature is 6.9°C (44.4°F).

Humidity

The average relative humidity is 83%.

Rainfall

In Mertenne, during 17.8 rainfall days, 45mm (1.77") of precipitation is typically accumulated. Throughout the year, in Mertenne, Belgium, there are 188.7 rainfall days, and 575mm (22.64") of precipitation is accumulated.

Snowfall

In Mertenne snow does not fall in May through September.

Daylight

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

Sunshine

In Mertenne, the average sunshine in May is 7.9h.

UV index

The average daily maximum UV index in Mertenne is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
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 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in May in Mertenne?

In May, in Mertenne, the average high-temperature is 16.4°C (61.5°F), and the average low-temperature is 6.9°C (44.4°F).

What is the average humidity in May in Mertenne?

In May, the average relative humidity is 83%.

How many days does it rain in May in Mertenne?

In Mertenne, Belgium, in May, it is raining for 17.8 days, with typically 45mm (1.77") of accumulated precipitation.

Does it snow in Mertenne in May?

In May, it doesn't snow. April is the latest month when it typically snows.

When it does not snow in Mertenne?

In Mertenne, Belgium, snow does not fall in May through September.

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

In May, the average length of the day in Mertenne, Belgium, is 15.5h.

How long on average sun shines in May in Mertenne?

In Mertenne, the average sunshine in May is 7.9h.

What is the UV index reading in May in Mertenne?

The average daily maximum UV index in May in Mertenne, 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
Mertenne, Belgium

Average temperature in May - Mertenne, Belgium
  • Average high temperature in May: 16.4°C

The warmest month (with the highest average high temperature) is July (21.9°C).
The month with the lowest average high temperature is January (3.9°C).

  • Average low temperature in May: 6.9°C

The month with the highest average low temperature is August (12.4°C).
The coldest month (with the lowest average low temperature) is January (-0.2°C).

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Average pressure in May
Mertenne, Belgium

Average pressure in May - Mertenne, Belgium
  • Average pressure in May: 1016.3mbar

The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1013.1mbar).

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Average wind speed in May
Mertenne, Belgium

Average wind speed in May - Mertenne, Belgium
  • Average wind speed in May: 11.9km/h

The windiest month (with the highest average wind speed) is December (17.4km/h).
The calmest month (with the lowest average wind speed) is August (10.6km/h).

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Average humidity in May
Mertenne, Belgium

Average humidity in May - Mertenne, Belgium
  • Average humidity in May: 83%

The month with the highest relative humidity is December (91%).
Months with the lowest relative humidity are April and August (79%).

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Average rainfall in May
Mertenne, Belgium

Average rainfall in May - Mertenne, Belgium
  • Average rainfall in May: 45mm

The wettest month (with the highest rainfall) is December (71mm).
The driest month (with the least rainfall) is April (31mm).

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Average rainfall days in May
Mertenne, Belgium

Average rainfall days in May - Mertenne, Belgium
  • Average rainfall days in May: 17.8 days

The month with the highest number of rainy days is July (18.9 days).
The month with the least rainy days is February (12.4 days).

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Average snowfall in May
Mertenne, Belgium

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

The month with the highest snowfall is January (68mm).
Months with the least snowfall are May, June, July, August and September (0mm).

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Average snowfall days in May
Mertenne, Belgium

Average snowfall days in May - Mertenne, Belgium
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (8.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Mertenne, Belgium

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

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 May: 7.9h

The month with the most sunshine is July (Average sunshine: 8.9h).
Months with the least sunshine are January and December (Average sunshine: 3.4).

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Average sunshine days in May
Mertenne, Belgium

Average sunshine days in May - Mertenne, Belgium
  • Average sunshine days in May: 10.5 days

Months with the most sunshine days are April and October (13.4 days).
The month with the least sunshine days is December (9.4 days).

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Average UV index in May
Mertenne, Belgium

Average UV index in May - Mertenne, Belgium
  • Average UV index in May: 4

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

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Average cloud cover in May
Mertenne, Belgium

Average cloud cover in May - Mertenne, Belgium
  • Average cloud cover in May: 49

The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 43).

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Average visibility in May
Mertenne, Belgium

Average visibility in May - Mertenne, Belgium
  • Average visibility in May: 8km

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

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