Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The introduction of December sees an average high-temperature of a chilly 7.7°C (45.9°F), hardly deviating from November. Night temperatures during December in Heiloo, Netherlands, experience a slight downturn, averaging a wintry 5.6°C (42.1°F).Humidity
January and December, with an average relative humidity of 83%, are the most humid months in Heiloo.Rainfall
In Heiloo, during December, the rain falls for 17 days and regularly aggregates up to 33mm (1.3") of precipitation. In Heiloo, during the entire year, the rain falls for 169.2 days and collects up to 339mm (13.35") of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 1.8 snowfall days, it receives 6mm (0.24") of snow. Throughout the year, in Heiloo, there are 7.7 snowfall days, and 23mm (0.91") of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 7h and 42min of daylight.On the first day of December, sunrise is at 08:30 and sunset at 16:30. On the last day of the month, sunrise is at 08:52 and sunset at 16:36 CET.
Sunshine
December has the least sunshine of the year, with an average of 3.4h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the temperature in December in Heiloo?
What are the most humid months in Heiloo?
What is the average humidity in December in Heiloo?
How many days does it rain in December in Heiloo?
When does it start to snow in Heiloo?
What is the month with the shortest days in Heiloo?
How many hours of daylight does Heiloo have in December?
When is the sunrise / sunset in December in Heiloo?
What is the month with the least sunshine in Heiloo?
How long on average sun shines in December in Heiloo?
What are the months with the lowest UV index in Heiloo?
What is the UV index reading in December in Heiloo?
Average temperature in December
Heiloo, Netherlands
- Average high temperature in December: 7.7°C
The warmest month (with the highest average high temperature) is August (19.9°C).
The months with the lowest average high temperature are January and February (5.8°C).
- Average low temperature in December: 5.6°C
The month with the highest average low temperature is August (16.6°C).
The coldest month (with the lowest average low temperature) is February (3.3°C).
Average pressure in December
Heiloo, Netherlands
- Average pressure in December: 1013.9mbar
The month with the highest atmospheric pressure is September (1016.6mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).
Average wind speed in December
Heiloo, Netherlands
- Average wind speed in December: 28.4km/h
The windiest month (with the highest average wind speed) is December (28.4km/h).
The calmest month (with the lowest average wind speed) is July (18km/h).
Average humidity in December
Heiloo, Netherlands
- Average humidity in December: 83%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is August (76%).
Average rainfall in December
Heiloo, Netherlands
- Average rainfall in December: 33mm
The wettest month (with the highest rainfall) is August (48mm).
The driest month (with the least rainfall) is April (11mm).
Average rainfall days in December
Heiloo, Netherlands
- Average rainfall days in December: 17 days
The month with the highest number of rainy days is August (17.2 days).
The month with the least rainy days is April (10.6 days).
Average snowfall in December
Heiloo, Netherlands
- Average snowfall in December: 6mm
The month with the highest snowfall is February (9mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Heiloo, Netherlands
- Average snowfall days in December: 1.8 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Heiloo, Netherlands
- Average daylight in December: 7h and 4min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in December: 3h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).
Average sunshine days in December
Heiloo, Netherlands
- Average sunshine days in December: 9.1 days
The month with the most sunshine days is April (17.7 days).
The month with the least sunshine days is December (9.1 days).
Average UV index in December
Heiloo, Netherlands
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Heiloo, Netherlands
- Average cloud cover in December: 67
The month with the most cloud cover is December (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in December
Heiloo, Netherlands
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (10km).
The month with the lowest visibility is December (9km).
Heiloo, Netherlands
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