Dun Laoghaire Weather in December

December in Dun Laoghaire typically sees daytime highs of 10°C (50°F) and nighttime lows of 5°C (41°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 December

Past climate data indicates that roughly 17 days will see rain, totalling around 88 mm (3.5 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Dun Laoghaire in December

Dun Laoghaire in December gets highs of 10°C (50°F) during the day and drops to 5°C (41°F) at night. December is in the winter season. It stays cool throughout the day, so warm layers are a good idea from morning to evening. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Dun Laoghaire in December

The month has fewer sunny days, with around 51 hours of sunshine.

Wind Speed in Dun Laoghaire in December

December 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 December

With water temperatures around 11°C (52°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

December 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.