Antrim County Weather in December

Average temperatures, rainfall, sunshine and the best places to visit in Antrim County, the United Kingdom in December.

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Belfast Portrush Bushmills Cushendall

Are you planning a trip a to Antrim County, the United Kingdom in December and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Antrim County in December

Antrim County, the United Kingdom is a region in the United Kingdom. December in Antrim County generally has cold temperatures, with precipitation levels ranging from moderate to high. It's the height of winter.

Temperatures

You can expect cold maximum daytime temperatures of around 9°C (48°F) and nighttime temperatures around 4°C (39°F) in Belfast.

For a closer look at conditions across Antrim County, the United Kingdom, refer to the map below.

Precipitation

In December, precipitation varies across different areas. From moderate rainfall in Aghalee with an average of 80 mm (3.1 in) to high rainfall in Ballintoy with 159 mm (6.3 in).

Average sunshine

Many places experience limited sunshine during this period. Belfast receives around 39 hours of sunlight. If you prefer more sunny conditions, our weather planner can help you explore other destinations.

Explore Antrim County by month

Pick a month to see the average temperature, rainfall and sunshine in Antrim County — and find the best time to visit. (based on Belfast)

January9°C (48°F) February9°C (48°F) March10°C (50°F) April12°C (54°F) May15°C (59°F) June17°C (63°F) This monthJuly19°C (66°F) August19°C (66°F) September17°C (63°F) October14°C (57°F) November11°C (52°F) December9°C (48°F)
Best Time to Visit Antrim County →

Best Places to Visit in Antrim County in December

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Antrim County.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Antrim County

What is the weather like in December for some of the most popular destinations in Antrim County, the United Kingdom?

Temperature range in Antrim County (December)

Precipitation variation in Antrim County (December)

Belfast

In December Belfast generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 4°C (39°F) and moderate monthly rainfall. So on average the conditions are poor that month.

« November
December
January »
November
December
January
Max temperature
11°C (52°F)
9°C (48°F)
9°C (48°F)
Min temperature
6°C (43°F)
4°C (39°F)
4°C (39°F)
Monthly sun hours
59 hours
39 hours
45 hours
Monthly rainfall
98 mm (3.9 in)
95 mm (3.7 in)
89 mm (3.5 in)
Monthly rainy days
19 days
20 days
20 days
Weather conditions
unpleasant
poor
poor
Climate in Belfast →

Portrush

In December Portrush generally has low temperatures with maximum daytime temperatures around 10°C (50°F), minimum nighttime temperatures around 6°C (43°F) and high monthly rainfall. So on average the conditions are poor that month.

« November
December
January »
November
December
January
Max temperature
12°C (54°F)
10°C (50°F)
9°C (48°F)
Min temperature
8°C (46°F)
6°C (43°F)
5°C (41°F)
Monthly sun hours
58 hours
39 hours
50 hours
Monthly rainfall
151 mm (5.9 in)
148 mm (5.8 in)
127 mm (5 in)
Monthly rainy days
22 days
22 days
22 days
Weather conditions
poor
poor
poor
Climate in Portrush →

Bushmills

In December Bushmills generally has low temperatures with maximum daytime temperatures around 10°C (50°F), minimum nighttime temperatures around 6°C (43°F) and high monthly rainfall. So on average the conditions are poor that month.

« November
December
January »
November
December
January
Max temperature
12°C (54°F)
10°C (50°F)
9°C (48°F)
Min temperature
8°C (46°F)
6°C (43°F)
5°C (41°F)
Monthly sun hours
58 hours
39 hours
50 hours
Monthly rainfall
151 mm (5.9 in)
149 mm (5.9 in)
127 mm (5 in)
Monthly rainy days
21 days
22 days
22 days
Weather conditions
poor
poor
poor
Climate in Bushmills →

Cushendall

In December Cushendall generally has low temperatures with maximum daytime temperatures around 10°C (50°F), minimum nighttime temperatures around 5°C (41°F) and high monthly rainfall. So on average the conditions are poor that month.

« November
December
January »
November
December
January
Max temperature
11°C (52°F)
10°C (50°F)
9°C (48°F)
Min temperature
7°C (45°F)
5°C (41°F)
4°C (39°F)
Monthly sun hours
59 hours
39 hours
45 hours
Monthly rainfall
123 mm (4.8 in)
120 mm (4.7 in)
108 mm (4.3 in)
Monthly rainy days
21 days
22 days
22 days
Weather conditions
poor
poor
poor
Climate in Cushendall →

Ballycastle

In December Ballycastle generally has low temperatures with maximum daytime temperatures around 10°C (50°F), minimum nighttime temperatures around 6°C (43°F) and high monthly rainfall. So on average the conditions are poor that month.

« November
December
January »
November
December
January
Max temperature
12°C (54°F)
10°C (50°F)
9°C (48°F)
Min temperature
8°C (46°F)
6°C (43°F)
5°C (41°F)
Monthly sun hours
59 hours
39 hours
45 hours
Monthly rainfall
155 mm (6.1 in)
153 mm (6 in)
130 mm (5.1 in)
Monthly rainy days
21 days
22 days
22 days
Weather conditions
poor
poor
poor
Climate in Ballycastle →

Is your destination not in the list? Have a look at all destinations in Antrim County, in the United Kingdom.

In our records: the United Kingdom December extremes

Notable December records observed across cities in the United Kingdom in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the coldest December daytime high in the United Kingdom was -10°C (14°F) in Glasgow on December 29, 1995.
  • From our sources, the wettest December day in the United Kingdom brought 301 mm (12 in) in Belfast on December 4, 1982.

Popular cities in December

Day & night temperatures, rainfall and average weather in Antrim County in December.

City Weather Day temp Night temp Rainfall
Belfast 9°C (48°F) 4°C (39°F) 95 mm (3.7 in)
Portrush 10°C (50°F) 6°C (43°F) 148 mm (5.8 in)
Bushmills 10°C (50°F) 6°C (43°F) 149 mm (5.9 in)
Cushendall 10°C (50°F) 5°C (41°F) 120 mm (4.7 in)
Ballycastle 10°C (50°F) 6°C (43°F) 153 mm (6 in)
Ballymoney 9°C (48°F) 5°C (41°F) 117 mm (4.6 in)

Antrim County weather in December: frequently asked questions

What is the weather like in Antrim County, the United Kingdom in December?

Expect poor weather across Antrim County, the United Kingdom in December. The popular destination of Belfast averages 9°C (48°F) by day and 4°C (39°F) at night during this winter month.

What is the average temperature in Antrim County, the United Kingdom in December?

Belfast averages a daytime maximum of 9°C (48°F) in December, with overnight lows close to 4°C (39°F).

Does Antrim County, the United Kingdom get a lot of rain in December?

Not particularly. Belfast averages just 95 mm (3.7 in) of rain in December, making it a mostly dry month for Antrim County, the United Kingdom.

Is December a Good Time to Visit Antrim County, the United Kingdom?

In our view, December might not be the best time to travel to Antrim County, the United Kingdom with often poor weather in Belfast.

Generally speaking, the best visiting conditions can be found in July and August offering mostly pleasant weather in Belfast. On the other hand, the months of January, February, March and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Antrim County.

Weather and climate has detailed information for every country in the world. Are you going to the United Kingdom? Get detailed historical weather averages for many cities in the United Kingdom.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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