Belfast Weather in January

With daytime temperatures of 9°C (48°F) and nighttime lows of 3°C (37°F), January in Belfast brings low temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 80 mm (3.1 in) falls on average.

Rainfall in Belfast in January

Historically, approximately 22 days this month are expected to have rain, averaging 80 mm (3.1 in). With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Belfast in January

January in Belfast sees highs of 9°C (48°F) and lows of 3°C (37°F) overnight. January is known for being in the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. At 3°C (37°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions. It's generally the coldest month of the year, making it essential to pack warm layers and winter accessories.

Sunshine in Belfast in January

This month sees fewer sunny days, with about 45 hours of sunshine, perfect for those who enjoy cooler temperatures.

Wind Speed in Belfast in January

Wind speeds average 5 m/s (10 knots) during January. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.

Average water temperature in January

At 8°C (46°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Belfast. Our weather planner can help you explore destinations with more pleasant weather conditions.