Portrush weather in January 2025

Q: How cold is it in Portrush in January?

Daytime temperatures usually reach 7°C in Portrush in January, falling to 1°C at night.

Q: How sunny is it in Portrush in January?

There are normally 1 hour of bright sunshine each day in Portrush in January - that's 15% of daylight hours.

Q: Is the sea cold around Portrush in January?

The average sea temperature around Portrush in January is 9°C.

Q: Does it rain in Portrush in January?

There are usually 22 days with some rain in Portrush in January and the average monthly rainfall is 118mm.

Expect 7°C daytime maximum temperatures in the shade with on average 1 hours of sunshine per day in Portrush in January. Check more long-term weather averages for Portrush in January before you book your next holiday to Northern Ireland in 2025/2026.

7
7°C max day temperature
1
1 hour of sunshine per day
22
22 days with some rainfall
1
1°C min night temperature
8
8 hours of daylight per day
0
No heat & humidity
118
118 mm of monthly rainfall
0
No UV (Maximum) Index UV index
9
9°C sea temperature

More about Portrush

Portrush by month

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The January weather guide for Northern Ireland (Portrush) 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)