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
Herstal's weather subtly changes with the onset of December, barely falling from a frosty 9.1°C (48.4°F) in November to a wintry 5.6°C (42.1°F). Herstal's December nights observe a minor shift from the daytime temperatures, resulting in an average dip to 1.4°C (34.5°F).Humidity
December is the most humid month, with an average relative humidity of 89%.Rainfall
The month with the most rainfall in Herstal is December, when the rain falls for 17.3 days and typically aggregates up to 58mm (2.28") of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Herstal, during December, snow falls for 3.9 days and regularly aggregates up to 30mm (1.18") of snow. In Herstal, Belgium, during the entire year, snow falls for 18.2 days and aggregates up to 135mm (5.31") of snow.Daylight
With an average of 8h and 6min of daylight, December has the shortest days of the year in Herstal, Belgium.On the first day of the month, sunrise is at 08:17 and sunset at 16:35. On the last day of December, in Herstal, sunrise is at 08:38 and sunset at 16:42 CET.
Sunshine
The month with the least sunshine is December, with an average of 3.6h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. It's recommended to limit sun exposure when its radiation is at its peak during midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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Frequently asked questions
How cold is December in Herstal?
What is the most humid month in Herstal?
What is the average humidity in December in Herstal?
What is the wettest month in Herstal?
How much does it rain in Herstal in December?
How much does it snow in Herstal in December?
What is the month with the shortest days in Herstal?
What is the average length of the day in December in Herstal?
When are sunrise and sunset in December in Herstal?
What is the month with the least sunshine in Herstal?
How long on average sun shines in December in Herstal?
When is the lowest UV index in Herstal?
What is the UV index reading in December in Herstal?
Average temperature in December
Herstal, Belgium
- Average high temperature in December: 5.6°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 (4.1°C).
- Average low temperature in December: 1.4°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (-0.3°C).
Average pressure in December
Herstal, Belgium
- Average pressure in December: 1016.9mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1013.1mbar).
Average wind speed in December
Herstal, Belgium
- Average wind speed in December: 17km/h
The windiest month (with the highest average wind speed) is December (17km/h).
The calmest month (with the lowest average wind speed) is August (10.5km/h).
Average humidity in December
Herstal, Belgium
- Average humidity in December: 89%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are April and August (77%).
Average rainfall in December
Herstal, Belgium
- Average rainfall in December: 58mm
The wettest month (with the highest rainfall) is December (58mm).
The driest month (with the least rainfall) is April (26mm).
Average rainfall days in December
Herstal, Belgium
- Average rainfall days in December: 17.3 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is February (12.7 days).
Average snowfall in December
Herstal, Belgium
- Average snowfall in December: 30mm
The month with the highest snowfall is January (50mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Herstal, Belgium
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Herstal, Belgium
- Average daylight in December: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in December: 3h and 4min
The months with the most sunshine are July and August (Average sunshine: 9h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in December
Herstal, Belgium
- Average sunshine days in December: 9.7 days
The month with the most sunshine days is October (14.7 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in December
Herstal, Belgium
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Herstal, Belgium
- Average cloud cover in December: 63
The month with the most cloud cover is December (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in December
Herstal, Belgium
- Average visibility in December: 8km
The months with the highest visibility are March, April, May, June, July and August (9km).
The months with the lowest visibility are January, February, September, October, November and December (8km).
Herstal, Belgium
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