Dundalk Weather in January
January in Dundalk brings low temperatures, with daytime highs of 9°C (48°F) and nights around 3°C (37°F). Quite a bit of rainfall is expected, around 77 mm (3 in), so pack an umbrella.
Rainfall in Dundalk in January
Historically, the month has about 20 days of rain, averaging 77 mm (3 in) in total. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Dundalk in January
In January, Dundalk sees low temperatures, with highs of 9°C (48°F). Nights drop to around 3°C (37°F). During January, you'll experience the winter season. It stays cool throughout the day, so warm layers are a good idea from morning to evening. Nights drop to 3°C (37°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. This month is known for being the coldest, so make sure you pack appropriately with plenty of warm clothing.
Sunshine in Dundalk in January
The city usually sees around 56 hours of sunlight, indicating fewer sunny days.January in Dundalk can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Dundalk's climate page.
Dundalk Temperature in January
Min Temperature
3°C (37°F)
Max Temperature
9°C (48°F)
Chance of Rain
66%
Precipitation
77 mm (3 in)
Rainy days
20 days
Humidity
81% *
Sunshine
56 hours *
Percentage Sunshine
25% *
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Dundalk typically stay consistent throughout January, with daily highs averaging around 9°C (48°F). Nights are cold, with lows around 3°C (37°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Dundalk in January
Browse day-by-day weather records for Dundalk spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Dundalk historical weather extremes in January
According to our 25 years of weather records for Dundalk, the following extremes were recorded between 2000 and 2025.
- The hottest January day on record in Dundalk reached 15°C (59°F) (January 24, 2016).
- On January 8, 2010, Dundalk saw its coldest January day with temperatures maxing out at -1°C (30°F).
- The lowest overnight temperature recorded in January was -9°C (16°F) (January 8, 2010).
- The heaviest January precipitation occurred on January 8, 2005, when 40 mm (1.6 in) of precipitation fell.
Best Places in Ireland in January
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in January →
perfect weather
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tolerable
unpleasant
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What to Wear in Dundalk in January
Cold weather calls for smart layering in January. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Rain gear is recommended, you can expect wet weather on multiple days. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.What To Do in Dundalk in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Dundalk's climate page.
Temperature Rainfall Sunshine Humidity
See the full Dundalk climate overview or explore weather in Ireland.
