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
December
Weather in December
Temperature
With the commencement of December, Herstal records a moderate temperature decline, with the average high easing from November's chilly 9.1°C (48.4°F) to a wintry 5.6°C (42.1°F). Herstal, during the nights of December, averages a temperature close to its daytime high, at 1.4°C (34.5°F).Humidity
With an average relative humidity of 89%, December is the most humid month.Rainfall
December is the month with the most rainfall. Rain falls for 17.3 days and accumulates 58mm (2.28") of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 3.9 days. Throughout December, 30mm (1.18") of snow is accumulated. Throughout the year, there are 18.2 snowfall days, and 135mm (5.31") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 6min of daylight.On the first day of December, sunrise is at 08:17 and sunset at 16:35. On the last day of the month, 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 of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the most humid month?
What is the average humidity in December?
What is the rainiest month?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Herstal have in December?
When is the sunrise / sunset in December in Herstal?
What is the month with the least sunshine?
How long on average sun shines in December in Herstal?
When is the lowest UV index?
How high is the UV index in December?
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).
