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
December's average high-temperature in St. Mary Cray stands at a chilly 7.9°C (46.2°F), showing little deviation from November's 10.2°C (50.4°F). St. Mary Cray registers a small shift from peak daytime temperatures, with a consistent average low-temperature of 3.6°C (38.5°F) during December.Humidity
With an average relative humidity of 89%, December is the most humid month in St. Mary Cray.Rainfall
The month with the most rainfall in St. Mary Cray, United Kingdom, is December, when the rain falls for 12.5 days and typically aggregates up to 38mm (1.5") of precipitation.Snowfall
Months with snowfall in St. Mary Cray are January through April, November and December. In St. Mary Cray, in December, during 2.3 snowfall days, 17mm (0.67") of snow is typically accumulated. Throughout the year, in St. Mary Cray, there are 11.9 snowfall days, and 69mm (2.72") of snow is accumulated.Daylight
December has the shortest days of the year in St. Mary Cray, with an average of 7h and 54min of daylight.On the first day of the month, sunrise is at 7:42 am and sunset at 3:54 pm. On the last day of December, in St. Mary Cray, United Kingdom, sunrise is at 8:04 am and sunset at 4:01 pm GMT.
Sunshine
The average sunshine in December in St. Mary Cray, United Kingdom, is 4.2h.UV index
The months with the lowest UV index in St. Mary Cray are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 2 in December suggests the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What is the average December temperature in St. Mary Cray?
What is the most humid month in St. Mary Cray?
What is the average humidity in December in St. Mary Cray?
What is the rainiest month in St. Mary Cray?
How many days does it rain in December in St. Mary Cray?
How many days does it snow in December in St. Mary Cray?
What is the month with the shortest days in St. Mary Cray?
How many hours of daylight does St. Mary Cray have in December?
When is the sunrise / sunset in December in St. Mary Cray?
How long on average sun shines in December in St. Mary Cray?
What is the month with the lowest UV index in St. Mary Cray?
What is the UV index intensity in December in St. Mary Cray?
Average temperature in December
St. Mary Cray, 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
St. Mary Cray, 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
St. Mary Cray, 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
St. Mary Cray, 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
St. Mary Cray, 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
St. Mary Cray, 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
St. Mary Cray, 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
St. Mary Cray, 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
St. Mary Cray, United Kingdom
- Average daylight in December: 7h and 5min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- 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
St. Mary Cray, 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
St. Mary Cray, 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
St. Mary Cray, 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
St. Mary Cray, 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).
St. Mary Cray, United Kingdom
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