Dublin Weather in January
January in Dublin typically sees daytime highs of 9°C (48°F) and nighttime lows of 4°C (39°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the winter season.
Rainfall in Dublin in January
Typically around 18 days of rainfall are expected, averaging 71 mm (2.8 in) for the month. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.
Temperature in Dublin in January
If you're visiting Dublin in January, expect highs of 9°C (48°F) and overnight lows around 4°C (39°F). January is part of the winter season. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. Nights drop to 4°C (39°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. The city often sees its mildest temperatures during January.
Sunshine in Dublin in January
The month is characterized by fewer sunny days, with roughly 56 hours hours of sunshine. Ideal for those who prefer a cooler, cloudier climate.
Wind Speed in Dublin in January
Average wind conditions reach 6 m/s (12 knots) in January. This creates notably windy weather that is clearly felt and can influence daily activities. Keep in mind this is an average. Some days are less intense, while others can be quite gusty.
Average water temperature in January
At 10°C (50°F), the water is too cold for most people to swim comfortably. A wetsuit is pretty much essential if you plan to go in.Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Dublin.
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 Dublin's climate page.
Dublin Temperature in January
Min Temperature
4°C (39°F)
Max Temperature
9°C (48°F)
Water Temperature
10°C (50°F)
Chance of Rain
61%
Precipitation
71 mm (2.8 in)
Rainy days
18 days
Humidity
81%
Windspeed
6 m/s (12 knots)
Sunshine
56 hours
Percentage Sunshine
25%
Daily Historical Temperatures
50-year average (1976-2026)
Based on our historical records, temperatures in Dublin 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
50-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 Dublin in January
Browse day-by-day weather records for Dublin spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Dublin historical weather extremes in January
Based on 25 years of weather observations (2000-2025), these are the most extreme conditions recorded in Dublin.
- The warmest day in January was on January 24, 2016, with a maximum of 15°C (59°F).
- On January 7, 2010, Dublin saw its coldest January day with temperatures maxing out at -3°C (27°F).
- Nighttime temperatures dropped to -9°C (16°F) on January 8, 2010, marking the coldest January night on record.
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
pleasant
tolerable
unpleasant
poor
What to Wear in Dublin in January
Dress warmly and in layers for your trip to Dublin in January. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Wet weather is likely, so pack waterproof gear for multiple rainy days. Expect water temperatures of around 10°C (50°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Dublin 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 Dublin's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Dublin climate overview or explore weather in Ireland.
