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 shift into December in Belfast reveals an average high-temperature of a still chilly 7.3°C (45.1°F), closely mirroring November's climate. December nights reflect a consistent temperature dip to a cold 3.9°C (39°F), a slight descent from daytime peaks.Humidity
January and December, with an average relative humidity of 88%, are the most humid months in Belfast.Rainfall
In Belfast, during December, the rain falls for 16.5 days and regularly aggregates up to 51mm (2.01") of precipitation. Throughout the year, in Belfast, United Kingdom, there are 220.2 rainfall days, and 626mm (24.65") of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Belfast, United Kingdom, in December, during 1.2 snowfall days, 6mm (0.24") of snow is typically accumulated. In Belfast, during the entire year, snow falls for 8.2 days and aggregates up to 47mm (1.85") of snow.Sea temperature
In December, the average sea temperature is 10.5°C (50.9°F).Note: Navigating the 10.5°C (50.9°F) at 13°C (55.4°F) is no joy, and temperatures less than 10°C (50°F) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
With an average of 7h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 8:23 am and sunset at 4:02 pm. On the last day of December, sunrise is at 8:46 am and sunset at 4:07 pm GMT.
Sunshine
In Belfast, the average sunshine in December is 4.1h.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 value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Belfast in December?
What is the most humid month in Belfast?
What is the average humidity in December in Belfast?
How much does it rain in Belfast in December?
How much does it snow in Belfast in December?
How cold is the water in December in Belfast?
What is the month with the shortest days in Belfast?
What is the average length of the day in December in Belfast?
What time are sunrise and sunset in December in Belfast?
How long on average sun shines in December in Belfast?
What are the months with the lowest UV index in Belfast?
How high is the UV index in December in Belfast?
Average temperature in December
Belfast, United Kingdom
- Average high temperature in December: 7.3°C
The warmest month (with the highest average high temperature) is July (16.9°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in December: 3.9°C
The month with the highest average low temperature is August (11.3°C).
The coldest month (with the lowest average low temperature) is February (2.8°C).
Average pressure in December
Belfast, United Kingdom
- Average pressure in December: 1009.3mbar
The month with the highest atmospheric pressure is May (1015.6mbar).
The month with the lowest atmospheric pressure is November (1007.3mbar).
Average wind speed in December
Belfast, United Kingdom
- Average wind speed in December: 21.2km/h
The windiest month (with the highest average wind speed) is January (21.3km/h).
The calmest months (with the lowest average wind speed) are June and July (13.7km/h).
Average humidity in December
Belfast, United Kingdom
- Average humidity in December: 88%
The months with the highest relative humidity are January and December (88%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in December
Belfast, United Kingdom
- Average rainfall in December: 51mm
The wettest month (with the highest rainfall) is August (72mm).
The driest month (with the least rainfall) is May (38mm).
Average rainfall days in December
Belfast, United Kingdom
- Average rainfall days in December: 16.5 days
The month with the highest number of rainy days is August (23 days).
The month with the least rainy days is April (16.1 days).
Average snowfall in December
Belfast, United Kingdom
- Average snowfall in December: 6mm
The month with the highest snowfall is February (25mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Belfast, United Kingdom
- Average snowfall days in December: 1.2 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Belfast, United Kingdom
- Average sea temperature in December: 10.5°C
The best month for swimming (with the highest average sea temperature) is September (14.3°C).
The coldest month (with the lowest average sea temperature) is March (8°C).
Average daylight in December /
Average sunshine in December
Belfast, United Kingdom
- Average daylight in December: 7h and 2min
The month with the longest days is June (Average daylight: 17h and 12min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is June (Average sunshine: 7h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in December
Belfast, United Kingdom
- Average sunshine days in December: 9.4 days
The month with the most sunshine days is April (11.5 days).
The month with the least sunshine days is August (5.6 days).
Average UV index in December
Belfast, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (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
Belfast, United Kingdom
- Average cloud cover in December: 59
The months with the most cloud cover are January and February (Cloud cover 63).
The month with the least cloud cover is April (Cloud cover 55).
Average visibility in December
Belfast, 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).
Belfast, United Kingdom
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