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
The advent of December brings an average high-temperature of a frosty 7.9°C (46.2°F), exhibiting minor difference from the previous month. Keston's nocturnal average in December closely mirrors its daytime temperatures, settling at an icy 3.6°C (38.5°F).Humidity
With an average relative humidity of 89%, December is the most humid month in Keston.Rainfall
The month with the most rainfall is December, when the rain falls for 12.5 days and typically aggregates up to 38mm (1.5") of precipitation.Snowfall
January through April, November and December are months with snowfall in Keston, United Kingdom. In Keston, during December, snow falls for 2.3 days and regularly aggregates up to 17mm (0.67") of snow. In Keston, during the entire year, snow falls for 11.9 days and aggregates up to 69mm (2.72") of snow.Daylight
The month with the shortest days in Keston is December, with an average of 8h and 0min of daylight.On the first day of December, sunrise is at 7:43 am and sunset at 3:54 pm. On the last day of the month, sunrise is at 8:04 am and sunset at 4:01 pm GMT.
Sunshine
The average sunshine in December in Keston is 4.2h.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 unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 2 in December translates into this advice:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Keston?
What is the most humid month in Keston?
What is the average humidity in December in Keston?
What is the rainiest month in Keston?
How many days does it rain in December in Keston?
How many days does it snow in December in Keston?
What is the month with the shortest days in Keston?
How many hours of daylight does Keston have in December?
What time are sunrise and sunset in December in Keston?
How long on average sun shines in December in Keston?
What are the months with the lowest UV index in Keston?
How high is the UV index in December in Keston?
Average temperature in December
Keston, United Kingdom
- Average high temperature in December: 7.9°C
The warmest month (with the highest average high temperature) is July (21.9°C).
The month with the lowest average high temperature is January (6.7°C).
- Average low temperature in December: 3.6°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (2.4°C).
Average pressure in December
Keston, United Kingdom
- Average pressure in December: 1014.7mbar
The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).
Average wind speed in December
Keston, United Kingdom
- Average wind speed in December: 17.3km/h
The windiest month (with the highest average wind speed) is February (17.7km/h).
The calmest month (with the lowest average wind speed) is September (12.9km/h).
Average humidity in December
Keston, United Kingdom
- Average humidity in December: 89%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall in December
Keston, United Kingdom
- Average rainfall in December: 38mm
The wettest month (with the highest rainfall) is December (38mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in December
Keston, United Kingdom
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is September (9.7 days).
Average snowfall in December
Keston, United Kingdom
- Average snowfall in December: 17mm
The month with the highest snowfall is February (23mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Keston, United Kingdom
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is February (4.2 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
Keston, United Kingdom
- Average daylight in December: 8h and 0min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are July and August (Average sunshine: 8h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in December
Keston, United Kingdom
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in December
Keston, 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
Keston, United Kingdom
- Average cloud cover in December: 58
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 47).
Average visibility in December
Keston, 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).
