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.
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 Sligo's climate page.
Sligo Temperature in December
Min Temperature
3°C (37°F)
Max Temperature
9°C (48°F)
Chance of Rain
77%
Precipitation
124 mm (4.9 in)
Rainy days
23 days
Humidity
90% *
Sunshine
35 hours *
Percentage Sunshine
17% *
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 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
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tolerable
unpleasant
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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.
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 Sligo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Sligo climate overview or explore weather in Ireland.
