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
Porthkerry marks the onset of December with an average high-temperature of a frosty 8.5°C (47.3°F), a subtle shift from November's 10.3°C (50.5°F). December notes an average low temperature of 5.1°C (41.2°F) in Porthkerry, subtly down from the daytime highs.Humidity
The months with the highest humidity in Porthkerry are January, November and December, with an average relative humidity of 86%.Rainfall
In Porthkerry, in December, it is raining for 14.8 days, with typically 66mm (2.6") of accumulated precipitation. Throughout the year, there are 177.9 rainfall days, and 579mm (22.8") of precipitation is accumulated.Snowfall
Months with snowfall in Porthkerry are January through March, November and December. In Porthkerry, United Kingdom, in December, during 0.8 snowfall days, 8mm (0.31") of snow is typically accumulated. Throughout the year, there are 3.6 snowfall days, and 30mm (1.18") of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 7h and 54min of daylight.On the first day of December in Porthkerry, sunrise is at 7:56 am and sunset at 4:08 pm. On the last day of the month, sunrise is at 8:18 am and sunset at 4:14 pm GMT.
Sunshine
The average sunshine in December is 4h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 2 in December transforms into this advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Porthkerry in December?
What is the most humid month in Porthkerry?
What is the average humidity in December in Porthkerry?
How much does it rain in Porthkerry in December?
How much does it snow in Porthkerry in December?
What is the month with the shortest days in Porthkerry?
How many hours of daylight does Porthkerry have in December?
When is the sunrise / sunset in December in Porthkerry?
How many hours of sunshine does Porthkerry have in December?
What are the months with the lowest UV index in Porthkerry?
What is the UV index reading in December in Porthkerry?
Average temperature in December
Porthkerry, United Kingdom
- Average high temperature in December: 8.5°C
The warmest month (with the highest average high temperature) is July (18.8°C).
The month with the lowest average high temperature is January (7.4°C).
- Average low temperature in December: 5.1°C
The months with the highest average low temperature are July and August (12.8°C).
The coldest months (with the lowest average low temperature) are January and February (3.8°C).
Average pressure in December
Porthkerry, United Kingdom
- Average pressure in December: 1014.1mbar
The months with the highest atmospheric pressure are May and September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010mbar).
Average wind speed in December
Porthkerry, United Kingdom
- Average wind speed in December: 22km/h
The windiest month (with the highest average wind speed) is February (22.2km/h).
The calmest month (with the lowest average wind speed) is June (15km/h).
Average humidity in December
Porthkerry, United Kingdom
- Average humidity in December: 86%
The months with the highest relative humidity are January, November and December (86%).
The month with the lowest relative humidity is April (81%).
Average rainfall in December
Porthkerry, United Kingdom
- Average rainfall in December: 66mm
The wettest month (with the highest rainfall) is November (72mm).
The driest month (with the least rainfall) is April (31mm).
Average rainfall days in December
Porthkerry, United Kingdom
- Average rainfall days in December: 14.8 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is September (12.5 days).
Average snowfall in December
Porthkerry, United Kingdom
- Average snowfall in December: 8mm
The month with the highest snowfall is January (10mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Porthkerry, United Kingdom
- Average snowfall days in December: 0.8 days
The months with the highest number of snowfall days are January and February (1.1 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
Porthkerry, 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 0min
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
Porthkerry, United Kingdom
- Average sunshine days in December: 14.4 days
The month with the most sunshine days is September (15.7 days).
The month with the least sunshine days is July (10.5 days).
Average UV index in December
Porthkerry, 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
Porthkerry, United Kingdom
- Average cloud cover in December: 60
The month with the most cloud cover is November (Cloud cover 62).
The months with the least cloud cover are April and May (Cloud cover 47).
Average visibility in December
Porthkerry, 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).
