Average temperatures, rainfall and packing tips for Belfast, United Kingdom in January
January in Belfast is typically cool, with average daytime highs around 7°C and nights near 2°C. It is usually the coldest month of the year in Belfast.
Expect some rain: around 51 mm falls in Belfast during January on average.
If your dates are flexible, the most comfortable months in Belfast are usually July and August.
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In January, Belfast averages a daytime high of about 7°C and a night-time low of around 2°C, based on recent historical data. That makes it the coldest month of the year there.
Expect some rain: around 51 mm falls in Belfast during January on average.
January is a workable time to visit Belfast, with cool days - just pack accordingly. If your dates are flexible, the most comfortable months in Belfast are usually July and August.