ClimateAverages

Belfast Weather in January

JanFebMarAprMayJunJulAugSepOctNovDec
January daytime high
6.1°C
January overnight low
2.0°C
January average
4.2°C

In January, Belfast typically sees daytime highs of 6.1°C and overnight lows around 2.0°C. Compared to the annual average high of 12.0°C, January runs -5.8°C.

vs. annual avg high
-5.8°C
Rank among 12 months
#12 warmest
Hottest year overall
2025

Where January ranks in Belfast

Jan6°FebMarAprMayJunJulAugSepOctNovDec

FAQ

What is the average temperature in Belfast in January?

January in Belfast averages a daytime high of 6.1°C and an overnight low of 2.0°C.

Is January warm or cold in Belfast?

January runs -5.8°C compared to Belfast's annual average high of 12.0°C, ranking #12 of 12 months by warmth.

What should I pack for Belfast in January?

Plan for daytime highs near 6.1°C and cooler evenings around 2.0°C.

Other months for Belfast

FebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember

January in nearby cities

DerryLisburnNewtownabbeyBangorCraigavonCastlereagh