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 onset of December results in a small decrease in the average high-temperature, moderately receding from a chilly 8.5°C (47.3°F) in November to an icy 5.1°C (41.2°F). Grethem's evenings during December maintain an average temperature of 1.2°C (34.2°F), aligning closely with the daytime temperatures.Humidity
The months with the highest humidity are January and December, with an average relative humidity of 88%.Rainfall
In Grethem, in December, it is raining for 12.6 days, with typically 28mm (1.1") of accumulated precipitation. Throughout the year, there are 149.4 rainfall days, and 335mm (13.19") of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. The month with the most snowfall is December, when snow falls for 5.2 days and typically aggregates up to 43mm (1.69") of snow.Daylight
With an average of 7h and 42min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 08:11 and sunset at 16:10. On the last day of the month, sunrise is at 08:33 and sunset at 16:16 CET.
Sunshine
December has the least sunshine of the year in Grethem, with an average of 3.2h of sunshine.UV index
The months with the lowest UV index in Grethem are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: A typical high UV index of 2 in December suggests the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
Is December cold in Grethem?
What is the most humid month in Grethem?
What is the average humidity in December in Grethem?
How much does it rain in Grethem in December?
What is the snowiest month in Grethem?
How much does it snow in Grethem in December?
What is the month with the shortest days in Grethem?
What is the average length of the day in December in Grethem?
What time are sunrise and sunset in December in Grethem?
What is the month with the least sunshine in Grethem?
How many hours of sunshine does Grethem have in December?
What are the months with the lowest UV index in Grethem?
What is the UV index intensity in December in Grethem?
Average temperature in December
Grethem, Germany
- Average high temperature in December: 5.1°C
The warmest month (with the highest average high temperature) is August (23.9°C).
The month with the lowest average high temperature is January (3.1°C).
- Average low temperature in December: 1.2°C
The month with the highest average low temperature is August (14.2°C).
The coldest month (with the lowest average low temperature) is January (-0.7°C).
Average pressure in December
Grethem, Germany
- Average pressure in December: 1014.8mbar
The month with the highest atmospheric pressure is September (1017.1mbar).
The month with the lowest atmospheric pressure is November (1012.7mbar).
Average wind speed in December
Grethem, Germany
- Average wind speed in December: 17.2km/h
The windiest month (with the highest average wind speed) is December (17.2km/h).
The calmest month (with the lowest average wind speed) is August (12.5km/h).
Average humidity in December
Grethem, Germany
- Average humidity in December: 88%
The months with the highest relative humidity are January and December (88%).
The month with the lowest relative humidity is August (70%).
Average rainfall in December
Grethem, Germany
- Average rainfall in December: 28mm
The wettest month (with the highest rainfall) is July (39mm).
The driest month (with the least rainfall) is April (16mm).
Average rainfall days in December
Grethem, Germany
- Average rainfall days in December: 12.6 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is February (10 days).
Average snowfall in December
Grethem, Germany
- Average snowfall in December: 43mm
The month with the highest snowfall is December (43mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Grethem, Germany
- Average snowfall days in December: 5.2 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
Grethem, Germany
- 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 1min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in December
Grethem, Germany
- Average sunshine days in December: 13.5 days
The months with the most sunshine days are August and September (16.8 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in December
Grethem, Germany
- 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
Grethem, Germany
- Average cloud cover in December: 68
The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in December
Grethem, Germany
- Average visibility in December: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
Grethem, Germany
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