Belfast Weather in January
What's the weather like in Belfast (N Ireland) in January 2025?
The climate in Belfast during January can be summarized as cool and damp.
January is in the winter in Belfast and is typically the coldest month of the year. Daytime maximum temperatures average around a cold 7°C (44°F), whilst at night 2°C (35°F) is normal.
| Daytime temperature | 6.9°C 44.3°F |
|---|---|
| Nightly temperature | 1.6°C 34.8°F |
| Average temperature | 4.2°C 39.6°F |
| Daily sunshine | 1.9 hrs |
| Avg rainfall | 101 mm 4 ins |
| Rainy days | 20 days |
| Sea temperature | 8.3°C 47°F |
| Humidity | 91% |
| Windspeed | 23.4kph 15 mph |
On average January is the wettest month of the year in Belfast with around 101mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 20 days, although this may vary considerably.
On the flip side this corresponds to an average of 1.9 hours of sunshine per day.
January temperatures in Belfast
January rainfall
January hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Belfast in January 2025.
Other monthly averages
Best places to visit in January
Belfast weather stats
| Hottest month: | July | 18.2°C 64.8°F |
|---|---|---|
| Driest month: | April | 63mm 2.5ins |
| Sunniest month: | May | 6.5hrs |
| Coldest month: | January | 6.7°C 44.1°F |
| Wettest month: | January | 101mm 4ins |
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