Belfast weather in January
Long-run climate averages for Belfast, Northern Ireland in January, plus what the forecast models say for the days ahead.
In January, Belfast averages 7°C by day and 3°C at night. The wettest month is usually July.
January in Belfast averages a daytime high of 7°C and an overnight low of 3°C, which reads as cold for this part of the world. It is the coldest month of the year here. Across the whole year Belfast sees roughly 1125 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like — for that, see the live Belfast forecast with every model compared and how much they currently agree.
Belfast weather by month
what to expect in Belfast through the yearHere is Belfast's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Belfast by season.