Dun Laoghaire Weather in January

January in Dun Laoghaire 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 Dun Laoghaire in January

Historically, approximately 18 days this month are expected to have rain, averaging 80 mm (3.1 in). With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Dun Laoghaire in January

In January, Dun Laoghaire sees low temperatures, with highs of 9°C (48°F). Nights drop to around 4°C (39°F). Experience the winter season in January. It stays cool throughout the day, so warm layers are a good idea from morning to evening. With overnight lows of 4°C (39°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets. During this period, the city experiences its coolest temperatures annually.

Sunshine in Dun Laoghaire in January

This month sees fewer sunny days, with about 56 hours of sunshine, perfect for those who enjoy cooler temperatures.

Wind Speed in Dun Laoghaire in January

January sees wind speeds averaging 6 m/s (12 knots). You'll experience strong winds that cause whole trees to sway and require effort when walking against them. As an average, expect variation from moderate breezes to particularly windy days that affect daily routines.

Average water temperature in January

At 10°C (50°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

January in Dun Laoghaire has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.

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

Dun Laoghaire 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 80 mm (3.1 in)  

Rainy days 18 days  

Humidity 81% *  

Windspeed 6 m/s (12 knots) *  

Sunshine 56 hours *  

Percentage Sunshine 25% *  

* Data from: Dublin, Ireland (17 KM, 10 Miles).

What to Wear in Dun Laoghaire in January

We recommend to layer up for chilly conditions in Dun Laoghaire in January. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. Rain is likely on several days, so bring a good rain jacket. The water temperature sits at about 10°C (50°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. With limited sunshine expected, sunglasses aren't a priority for packing.

What To Do in Dun Laoghaire in January

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

4/10

Outdoor sports

4/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

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

More climate data for Dun Laoghaire

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Dun Laoghaire climate overview or explore weather in Ireland.