Newcastle weather in January 2026

Q: How cold is it in Newcastle in January?

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

Q: How sunny is it in Newcastle in January?

There are normally 2 hours of bright sunshine each day in Newcastle in January - that's 21% of daylight hours.

Q: Is the sea cold around Newcastle in January?

The average sea temperature around Newcastle in January is 8°C.

Q: Does it rain in Newcastle in January?

There are usually 20 days with some rain in Newcastle in January and the average monthly rainfall is 132mm.

Expect daytime maximum temperatures of 7°C in Newcastle, Northern Ireland in January based on long-term weather averages. There are 2 hours of sunshine per day on average with 20 days with some rainfall and typically 132 mm of rainfall in the month.

7
7°C max day temperature
2
2 hours of sunshine per day
20
20 days with some rainfall
1
1°C min night temperature
8
8 hours of daylight per day
0
No heat & humidity
132
132 mm of monthly rainfall
0
No UV (Maximum) Index UV index
8
8°C sea temperature

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The January weather guide for Northern Ireland (Newcastle) 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)