December · United Kingdom
Best time to visit Belfast in December Weather, crowds & prices
Weather in Belfast in December
Average temperature 6°C, 106 mm of rain, about 6 days with 6+ hours of sunshine and 87% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
4.2/10
Ranked #12 of 12 months
- Avg temp
- 6°C
- Rainfall
- 106 mm
- Humidity
- 87%
- Days with 6h+ sun
- 6
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
December in Belfast scores 4.2/10 for sightseeing and cultural travel - ranked #12 of 12. Expect around 6°C, 106 mm of rain, and roughly 6 days with 6+ hours of sunshine this month.
Belfast's Titanic Quarter, Cathedral Quarter, and political murals trace a shipbuilding city remaking its waterfront.
December in Belfast — the hardest end of the year
Expect 6°C (43°F) in December. A good month for city streets, viewpoints and long meals; leave swimming for another season.
106 mm of rain signals a properly wet month, with only about 6 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 4.2/10 on the same scale — 12th of 12 months, versus 8.1/10 for the best month here.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, June is materially better in Belfast — 3.9 points higher on the same scale.
Frequently asked
- What is the weather like in Belfast in December?
- In December, Belfast averages 6°C, 106 mm of rain, and about 6 days with 6+ hours of sunshine. Its climate-comfort score is 4.2/10.
- Is December a good time to visit Belfast?
- December earns a 4.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Belfast in December?
- Expect about 106 mm of rain in December. Average humidity is 87% and there are about 6 days with 6+ hours of sunshine.
Curated in Belfast
Tickets & experiences
Things to do in Belfast
Belfast, United Kingdom. Live activities and tours from GetYourGuide, matched to this destination.