Belfast weather in December 2024

Q: How warm is it in Belfast in December?

Daytime temperatures usually reach 8°C in Belfast in December, falling to 2°C at night.

Q: How sunny is it in Belfast in December?

There are normally 1 hour of bright sunshine each day in Belfast in December - that's 18% of daylight hours.

Q: Is the sea cold around Belfast in December?

The average sea temperature around Belfast in December is 10°C.

Q: Does it rain in Belfast in December?

There are usually 20 days with some rain in Belfast in December and the average monthly rainfall is 94mm.

Expect 8°C daytime maximum temperatures in the shade with on average 1 hours of sunshine per day in Belfast in December. Check more long-term weather averages for Belfast in December before you book your next holiday to Northern Ireland in 2024/2025.

8
8°C max day temperature
1
1 hour of sunshine per day
20
20 days with some rainfall
2
2°C min night temperature
7
7 hours of daylight per day
0
No heat & humidity
94
94 mm of monthly rainfall
0
No UV (Maximum) Index UV index
10
10°C sea temperature

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The December weather guide for Northern Ireland (Belfast) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)