January weather forecast
Ireland

January is the coldest month in Ireland, with temperatures frequently dipping below freezing. The daily average temperature ranges from 3°C (37.4°F) to 7°C (44.6°F), but can occasionally fall lower during cold snaps. The number of days with temperatures below freezing is highest during this month, averaging 20 in coastal areas like Dublin and more in the inland regions.

In comparison to December, January sees a slight decrease in temperature, and compared to February, it is relatively colder. Snow is relatively rare in Ireland, but when it does occur, it is most likely to fall in January. However, snowfall is often short-lived and does not typically result in significant accumulation. Frost is more common, particularly in inland regions and during the night.

The month of January sees a limited amount of sunshine, with daylight lasting for approximately 7 to 8 hours per day. The capital city, Dublin, typically sees just over 50 hours of sunshine throughout the month. The amount of sunshine is slightly lower than in December and significantly less than in February, as the days begin to lengthen towards the end of winter.

Rainfall in January remains relatively high, with an average precipitation of 80mm (3.15"). The west coast receives more rainfall than the eastern and southeastern parts of the country due to the Atlantic fronts. Galway, located on the west coast, receives significantly more rainfall than Dublin in the east. The northwestern areas are also the windiest in January, and they occasionally face Atlantic storms, bringing heavy rainfall and high winds.

Sea temperatures around the coast of Ireland are at their coldest in January, averaging 8°C (46.4°F) to 10°C (50°F), which significantly influences coastal weather conditions. The coastal areas, while being slightly milder than the inland regions due to the maritime influence, can also experience severe weather conditions when Atlantic storms hit the shores.

The weather patterns in January significantly vary across the country, with northern and inland regions experiencing colder and frostier conditions compared to the coastal areas. However, irrespective of the region, January remains the most winter-like month across Ireland, with its chilly temperatures, short days, and occasional snow or frost.

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• Dublin - January »
  The coldest time of the year in Dublin is January, with temperatures averaging a high of 8.8°C (47.8°F) and a low of 3.9°C (39°F). The chill of winter grips Dublin in the month of January, making it one of the coldest times of the year.
• Cork - January »
  January and February in Cork are characterised by lowest temperatures, with an average high of 8°C (46.4°F). On the last day of January, in Cork sunrise is at 8:15 am and sunset at 5:19 pm GMT.
• Galway - January »
  Galway experiences its lowest temperatures in January, with an average peak of 8.7°C (47.7°F) and a low of 3.5°C (38.3°F). January and December, with an average maximum UV index of 0, are months with the lowest UV index in Galway, Ireland.
• Limerick - January »
  The months with the most snowfall in Limerick are January and December, with an average 17mm (0.67") of accumulated snow. January, with its high-temperature average of 7.5°C (45.5°F) and a low-temperature average of 2.7°C (36.9°F), is the coldest month in Limerick, Ireland.
• Waterford - January »
  On the last day of January, in Waterford sunrise is at 8:11 am and sunset at 5:12 pm GMT. The months with the least sunshine in Waterford, Ireland, are January, February, November and December, with an average of 2h of sunshine.
• Drogheda - January »
  In Drogheda, in January, snow falls for 1.8 days, with typically accumulated 9mm (0.35") of snow. In Drogheda in January, during 12.9 rainfall days, 20mm (0.79") of precipitation is typically accumulated.
• Dundalk - January »
  January is the month when Dundalk sees the average lowest temperatures, with a high of 6.8°C (44.2°F) and a low of 2.2°C (36°F). In Dundalk during January, snow falls for 1.4 days and regularly aggregates up to 5mm (0.2") of snow.
• Swords - January »
  The month with the most snowfall days in Swords is January, when snow falls for 4.6 days. In January, in Swords the rain falls for 17 days.
• Bray - January »
  In Bray in January, snow falls for 1.3 days, with typically accumulated 5mm (0.2") of snow. In Bray during January, the rain falls for 16.6 days and regularly aggregates up to 41mm (1.61") of precipitation.
• Kilkenny - January »
  In Kilkenny in January, during 13 rainfall days, 78mm (3.07") of precipitation is typically accumulated. In Kilkenny during January, snow falls for 3.6 days.
• Ennis - January »
  The month with the most snowfall in Ennis is January, when snow falls for 0.6 days and typically aggregates up to 10mm (0.39") of snow. In Ennis, during January, snow falls for 0.6 days and regularly aggregates up to 10mm (0.39") of snow.