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Northern Ireland weather in January 2023
- 77°C max day temperature
- 2020 days with some rainfall
- 11°C min night temperature
- 88 hours of daylight per day
- 0No heat & humidity
- 101101 mm of monthly rainfall
- 0No UV (Maximum) Index UV index
- 99°C sea temperature
Below are average maximum temperatures at popular destinations in Northern Ireland in January. Select a destination to see more weather parameters.
Recommended for Northern Ireland
The January 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)
More about the UK
How cold is it in Northern Ireland in January?
Daytime temperatures usually reach 7°C in Belfast, Northern Ireland in January, falling to 1°C at night.
How sunny is it in Northern Ireland in January?
There are normally 2 hours of bright sunshine each day in Belfast, Northern Ireland in January - that's 20% of daylight hours.
Is the sea cold around Northern Ireland in January?
The average sea temperature around Belfast, Northern Ireland in January is 9°C.
Does it rain in Northern Ireland in January?
There are usually 20 days with some rain in Belfast, Northern Ireland in January and the average monthly rainfall is 101mm.
Northern Ireland January sunrise & sunset times
Browse the sunrise and sunset times for Northern Ireland in January 2023. Select a month to view Northern Ireland sunrise and sunset times for the next 12 months. The Northern Ireland sunrise and sunset times shown below are for Belfast.
|Date||Sunrise times||Sunset times|
|Sunday, 1st January 2023||08:46||16:08|
|Monday, 16th January 2023||08:36||16:31|
|Tuesday, 31st January 2023||08:15||17:00|
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