Temperature in Ireland in January

Daytime highs, nighttime lows and the warmest cities across Ireland this January.

Ireland, experiences low average maximum daytime temperatures in January, ranging from 8°C (46°F) in Donegal to 11°C (52°F) in Portmagee. Nighttime temperatures generally drop to 7°C (45°F) in Portmagee and 3°C (37°F) in Donegal. During January, winter is in full swing. 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.

Select a Month

Check the conditions for any month of the year.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

For a detailed overview over the year and the best time to visit Ireland, check out our Ireland's climate page.

See also: the Ireland weather by month.

Best Places to Visit in Ireland in January

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Ireland.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in January: blue is cold, red is hot.

See all January weather averages, cities and regions in Ireland

Ireland temperatures in January: frequently asked questions

How hot does it get in Ireland in January?

Dublin averages a daytime high of 9°C (48°F) in January, which is low for Ireland.

How cold does it get at night in Ireland in January?

Dublin sees nighttime lows close to 4°C (39°F) in January.

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 (52°F), while the nights are characterized by a low temperature close to 7°C (45°F).

What is the coldest city in January in Ireland?

According to our data, Donegal holds the title for the coldest city in Ireland in January. It experiences maximum temperatures of approximately 8°C (46°F) and drops to lows of about 3°C (37°F) during the night.

How much sun does Ireland get in January?

Dublin experiences limited sunny days, amounting to roughly 56 hours of sunshine. This makes it perfect for those who lean towards cooler, cloudier settings rather than intense sunlit days.

What is the water temperature in January?

The water temperature averages approximately 10°C (50°F) in Belmullet this month, generally too cold for comfortable swimming.

Interested in more climate information?

We have much more information about the climate in Ireland.

Weather and climate has detailed information for every country in the world. Are you going to Ireland? Get detailed historical weather averages for many cities in Ireland.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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