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 start of December sees the average high-temperature at a frosty 8.1°C (46.6°F), showing little difference from November's 10°C (50°F). Caerphilly's nighttime average temperature in December subtly descends to a wintry 4.5°C (40.1°F) from the daily highs.Humidity
January, November and December, with an average relative humidity of 87%, are the most humid months.Rainfall
In Caerphilly, in December, it is raining for 12.9 days, with typically 47mm (1.85") of accumulated precipitation. Throughout the year, in Caerphilly, there are 155.7 rainfall days, and 409mm (16.1") of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall in Caerphilly, United Kingdom. In Caerphilly, in December, during 0.7 snowfall days, 3mm (0.12") of snow is typically accumulated. In Caerphilly, during the entire year, snow falls for 5.5 days and aggregates up to 27mm (1.06") of snow.Daylight
With an average of 7h and 54min of daylight, December has the shortest days of the year in Caerphilly, United Kingdom.On the first day of December in Caerphilly, sunrise is at 7:57 am and sunset at 4:06 pm. On the last day of the month, sunrise is at 8:18 am and sunset at 4:13 pm GMT.
Sunshine
In Caerphilly, the average sunshine in December is 4.1h.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 reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Caerphilly in December?
What are the most humid months in Caerphilly?
What is the average humidity in December in Caerphilly?
How much does it rain in Caerphilly in December?
How many days does it snow in December in Caerphilly?
What is the month with the shortest days in Caerphilly?
How many hours of daylight does Caerphilly have in December?
When is the sunrise / sunset in December in Caerphilly?
How long on average sun shines in December in Caerphilly?
What is the month with the lowest UV index in Caerphilly?
What is the UV index intensity in December in Caerphilly?
Average temperature in December
Caerphilly, United Kingdom
- Average high temperature in December: 8.1°C
The warmest month (with the highest average high temperature) is July (18.9°C).
The month with the lowest average high temperature is January (7.2°C).
- Average low temperature in December: 4.5°C
The months with the highest average low temperature are July and August (12.5°C).
The coldest months (with the lowest average low temperature) are January and February (3.3°C).
Average pressure in December
Caerphilly, United Kingdom
- Average pressure in December: 1013.9mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.9mbar).
Average wind speed in December
Caerphilly, United Kingdom
- Average wind speed in December: 21.1km/h
The windiest month (with the highest average wind speed) is February (21.5km/h).
The calmest months (with the lowest average wind speed) are June and July (14.6km/h).
Average humidity in December
Caerphilly, United Kingdom
- Average humidity in December: 87%
The months with the highest relative humidity are January, November and December (87%).
The months with the lowest relative humidity are April and May (82%).
Average rainfall in December
Caerphilly, United Kingdom
- Average rainfall in December: 47mm
The wettest month (with the highest rainfall) is November (54mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in December
Caerphilly, United Kingdom
- Average rainfall days in December: 12.9 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (10.3 days).
Average snowfall in December
Caerphilly, United Kingdom
- Average snowfall in December: 3mm
The months with the highest snowfall are January and February (10mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Caerphilly, United Kingdom
- Average snowfall days in December: 0.7 days
The months with the highest number of snowfall days are January and February (2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Caerphilly, 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 1min
The months with the most sunshine are April, May and July (Average sunshine: 8h and 0min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).
Average sunshine days in December
Caerphilly, United Kingdom
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Caerphilly, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Caerphilly, United Kingdom
- Average cloud cover in December: 60
The month with the most cloud cover is November (Cloud cover 62).
The month with the least cloud cover is April (Cloud cover 47).
Average visibility in December
Caerphilly, United Kingdom
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
