Sligo Weather in December
Sligo in December averages 9°C (48°F) during the day and 3°C (37°F) at night. This is the wettest month of the year, and part of the winter season.
Rainfall in Sligo in December
With frequent rain showers this month, having an umbrella on hand will keep you dry. This month experiences about 23 days of rain according to historical data, averaging 124 mm (4.9 in). Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Sligo in December
December in Sligo brings typical temperatures with highs around 9°C (48°F) and lows of 3°C (37°F). During December, the winter season is in full swing. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With overnight lows of 3°C (37°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Sligo in December
The area sees fewer sunny days, with a projection of about 35 hours of sunshine. This reduced sunlight makes it ideal for those who prefer overcast conditions over bright sunny days.December in Sligo 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.
Sligo Temperature in December
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Sligo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sligo - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Sligo typically stay consistent throughout December, with daily highs averaging around 9°C (48°F). Nights are cold, with lows around 3°C (37°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather records for Sligo in December
Browse day-by-day weather records for Sligo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sligo historical weather extremes in December
The extremes listed below come from historical weather data collected in Sligo from 1976 through 2025.
- The warmest day in December was on December 1, 1985, with a maximum of 17°C (63°F).
- The lowest daytime temperature in December was -4°C (25°F), recorded on December 20, 2010.
- The coldest night in December in Sligo was on December 25, 2010, with a minimum of -10°C (14°F).
- Peak precipitation in December occurred on December 5, 2015, when 69 mm (2.7 in) of precipitation was measured.
Best Places in Ireland in December
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in December →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Sligo in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. With limited sunshine expected, sunglasses aren't a priority for packing.
What To Do in Sligo in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming4/10 -
Cycling4/10 -
Walking4/10 -
Camping3/10 -
Outdoor sports4/10
Sligo 3-Day Forecast
Temperature Rainfall Sunshine Humidity
See the full Sligo climate overview or explore weather in Ireland.
Popular in December
Where to go in December - average daytime high across popular destinations.
Doolin
11°C (52°F) Cork11°C (52°F) Westport9°C (48°F) Kilkenny
9°C (48°F) Kenmare10°C (50°F) Killarney10°C (50°F) Galway10°C (50°F) Dublin10°C (50°F) 
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