Weather in Belfast in December

General weather information about Belfast

Average annual temperature is 8.9 °C

Absolute maximum temperature: 30.6 °C

Absolute minimum temperature: -28.2 °C

Number of sunny days: 155 days

Number of rainy days: 181 days

Number of snow days: 29 days

* Weather data for Belfast United States is based on climate observations for 2026 year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	9.9	11.5	11.1	22.2	29.6	27.9	29.4	26.8	30.6	26.7	14.4	13.0
Average daytime temperature (°C)	3.3	1.4	5.1	11.3	18.0	19.2	25.5	23.1	22.2	16.5	6.8	4.6
Average temperature (°C)	-0.5	-3.6	1.2	6.9	12.7	15.3	21.3	19.1	17.6	12.5	2.6	0.9
Average night temperature (°C)	-3.9	-8.2	-2.4	3.1	8.0	12.3	18.0	15.6	14.0	9.1	-0.7	-2.2
Absolute minimum temperature (°C)	-10.2	-28.2	-9.2	-4.0	2.2	6.5	14.2	11.4	8.2	0.6	-6.6	-11.0

The best time to visit Belfast during the most sunny months:

Months with the longest average daylight duration in Belfast:

The largest precipitation sum in Belfast is at

January — 185(mm)

June — 171(mm)

July — 168(mm)

October — 202(mm)

December — 167(mm)

When is the best time to visit Belfast?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Belfast.

What is the weather like in Belfast?

See average temperature, rainfall and daylight hours for Belfast by month in the table above.

How many sunny days does Belfast have?

The monthly weather statistics above show sunshine and rainfall patterns for Belfast throughout the year.