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 sea temperature 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 transition into December marks the average high-temperature at a frosty 8.6°C (47.5°F), differing minimally from November's 10.4°C (50.7°F). During the nights of December, Cardiff maintains an almost steady temperature with an average low of 5.2°C (41.4°F).Humidity
November and December, with an average relative humidity of 86%, are the most humid months in Cardiff.Rainfall
In Cardiff, in December, during 12.5 rainfall days, 27mm (1.06") of precipitation is typically accumulated. Throughout the year, in Cardiff, there are 132.6 rainfall days, and 252mm (9.92") of precipitation is accumulated.Snowfall
Months with snowfall are January, February, November and December. In Cardiff, in December, snow falls for 0.7 days, with typically accumulated 1mm (0.04") of snow. Throughout the year, in Cardiff, there are 3.1 snowfall days, and 8mm (0.31") of snow is accumulated.Sea temperature
In Cardiff, United Kingdom, in December, the average water temperature is 11.5°C (52.7°F).Note: Without suitable protection, venturing into 11.5°C (52.7°F) waters cooler than 10°C (50°F) can lead to pronounced cold shock and rapid breaths.
Daylight
December has the shortest days of the year in Cardiff, with an average of 7h and 54min of daylight.On the first day of the month, sunrise is at 7:56 am and sunset at 4:07 pm. On the last day of December, sunrise is at 8:18 am and sunset at 4:13 pm GMT.
Sunshine
In December, the average sunshine in Cardiff 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 estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the average December temperature in Cardiff?
What is the most humid month in Cardiff?
What is the average humidity in December in Cardiff?
How many days does it rain in December in Cardiff?
How many days does it snow in December in Cardiff?
What is the water temperature in December in Cardiff?
What is the month with the shortest days in Cardiff?
How many hours of daylight does Cardiff have in December?
What time are sunrise and sunset in December in Cardiff?
How long on average sun shines in December in Cardiff?
When is the lowest UV index in Cardiff?
What is the UV index intensity in December in Cardiff?
Average temperature in December
Cardiff, United Kingdom
- Average high temperature in December: 8.6°C
The warmest month (with the highest average high temperature) is July (19°C).
The month with the lowest average high temperature is January (7.5°C).
- Average low temperature in December: 5.2°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is February (3.9°C).
Average pressure in December
Cardiff, United Kingdom
- Average pressure in December: 1014mbar
The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010mbar).
Average wind speed in December
Cardiff, United Kingdom
- Average wind speed in December: 22km/h
The windiest month (with the highest average wind speed) is February (22.3km/h).
The calmest months (with the lowest average wind speed) are June and July (15.2km/h).
Average humidity in December
Cardiff, United Kingdom
- Average humidity in December: 86%
The months with the highest relative humidity are November and December (86%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in December
Cardiff, United Kingdom
- Average rainfall in December: 27mm
The wettest months (with the highest rainfall) are August and November (31mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days in December
Cardiff, United Kingdom
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is November (13.5 days).
The months with the least rainy days are February and April (9.1 days).
Average snowfall in December
Cardiff, United Kingdom
- Average snowfall in December: 1mm
The month with the highest snowfall is February (5mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Cardiff, United Kingdom
- Average snowfall days in December: 0.7 days
The month with the highest number of snowfall days is February (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Cardiff, United Kingdom
- Average sea temperature in December: 11.5°C
The best months for swimming (with the highest average sea temperature) are August and September (16.6°C).
The coldest month (with the lowest average sea temperature) is March (8.7°C).
Average daylight in December /
Average sunshine in December
Cardiff, 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 month with the most sunshine is May (Average sunshine: 8h and 12min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).
Average sunshine days in December
Cardiff, United Kingdom
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is April (19.2 days).
The month with the least sunshine days is November (13.7 days).
Average UV index in December
Cardiff, 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
Cardiff, United Kingdom
- Average cloud cover in December: 59
The month with the most cloud cover is November (Cloud cover 61).
The months with the least cloud cover are April and May (Cloud cover 46).
Average visibility in December
Cardiff, United Kingdom
- Average visibility in December: 10km
The months with the highest visibility are February, March and December (10km).
The months with the lowest visibility are January, April, May, June, July, August, September, October and November (9km).
Cardiff, United Kingdom
Weather forecast for your location
2. Allow the app to use your location
