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Temperature in Ireland in January

In Ireland in January the average maximum daytime temperatures are low and range from 8°C in Donegal to 11°C in Portmagee. Nighttime temperatures generally drop to 7°C in Portmagee and 3°C in Donegal. The month of January is in the winter season. On average, it is one of the coldest months of the year.

What is the temperature of the different cities in Ireland in January?

Explore the map below to discover average January temperatures at the top destinations in Ireland. For a deeper dive, simply click on any destination dot.

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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • What is the warmest city in January in Ireland?
  • Data insights from our comprehensive database indicate that Portmagee is the city with the highest warmth. Daytime peaks average near 11°C, while the nights are characterized by a low temperature close to 7°C."

  • What is the coldest city in January in Ireland?
  • In our database, Donegal is the chilliest city in January in Ireland. Daytime temperatures typically peak at 8°C, while the nighttime lows hover around 3°C.

  • How much sun does Ireland get in January?
  • The city Dublin usually sees around 56 hours of sunlight, indicating fewer sunny days.

  • What is the water's temperature in January?
  • The water temperature averages approximately 10°C in Belmullet this month, so not the best month to swim.

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