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 shift into December uncovers an average high-temperature of a still frosty 7.3°C (45.1°F), subtly different from the previous month. During the December nights, London Colney's temperature maintains an average close to the daytime highs, settling at a cold 2.9°C (37.2°F).Humidity
The most humid month is December, with an average relative humidity of 90%.Rainfall
In December, the rain falls for 12.3 days. Throughout December, 38mm (1.5") of precipitation is accumulated. Throughout the year, in London Colney, there are 159.2 rainfall days, and 359mm (14.13") of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall in London Colney. The month with the most snowfall is December, when snow falls for 2 days and typically aggregates up to 20mm (0.79") of snow.Daylight
With an average of 7h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:46 am and sunset at 3:54 pm. On the last day of December, in London Colney, sunrise is at 8:07 am and sunset at 4:01 pm GMT.
Sunshine
The average sunshine in December is 4.4h.UV index
The months with the lowest UV index in London Colney 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 threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 2 in December translates into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What is the average December temperature in London Colney?
What is the most humid month in London Colney?
What is the average humidity in December in London Colney?
How much does it rain in London Colney in December?
What is the snowiest month in London Colney?
How much does it snow in London Colney in December?
What is the month with the shortest days in London Colney?
What is the average length of the day in December in London Colney?
When are sunrise and sunset in December in London Colney?
How many hours of sunshine does London Colney have in December?
What are the months with the lowest UV index in London Colney?
What is the UV index intensity in December in London Colney?
Average temperature in December
London Colney, United Kingdom
- Average high temperature in December: 7.3°C
The warmest month (with the highest average high temperature) is July (21.6°C).
The month with the lowest average high temperature is January (6.4°C).
- Average low temperature in December: 2.9°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in December
London Colney, United Kingdom
- Average pressure in December: 1014.2mbar
The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010.4mbar).
Average wind speed in December
London Colney, United Kingdom
- Average wind speed in December: 18km/h
The windiest month (with the highest average wind speed) is February (18.2km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in December
London Colney, United Kingdom
- Average humidity in December: 90%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (76%).
Average rainfall in December
London Colney, United Kingdom
- Average rainfall in December: 38mm
The wettest month (with the highest rainfall) is June (44mm).
The driest month (with the least rainfall) is September (19mm).
Average rainfall days in December
London Colney, United Kingdom
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is September (10.7 days).
Average snowfall in December
London Colney, United Kingdom
- Average snowfall in December: 20mm
The month with the highest snowfall is December (20mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
London Colney, United Kingdom
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is February (3.5 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
London Colney, United Kingdom
- Average daylight in December: 7h and 5min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in December: 4h and 2min
The months with the most sunshine are July and August (Average sunshine: 8h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in December
London Colney, United Kingdom
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
London Colney, United Kingdom
- 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
London Colney, United Kingdom
- Average cloud cover in December: 58
The months with the most cloud cover are February and November (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 48).
Average visibility in December
London Colney, United Kingdom
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
London Colney, United Kingdom
Weather forecast for your location
2. Allow the app to use your location
