Cong Weather in December
December in Cong brings low temperatures around 9°C (48°F) during the day, dropping to 4°C (39°F) at night, with the most rainfall of the year.
Rainfall in Cong in December
The month brings the most rain, so be prepared with an umbrella for the occasional shower. On average, there are about 23 days with rain during this month, averaging 119 mm (4.7 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Cong in December
Temperatures in Cong in December top out at 9°C (48°F) and drop to 4°C (39°F) overnight. During December, the winter season is in full swing. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. Nights fall to 4°C (39°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Cong in December
The month has fewer sunny days, with around 35 hours of sunshine.December in Cong 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 Cong's climate page.
Cong Temperature in December
Min Temperature
4°C (39°F)
Max Temperature
9°C (48°F)
Chance of Rain
75%
Precipitation
119 mm (4.7 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 Cong 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 Cong in December
Browse day-by-day weather records for Cong spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cong historical weather extremes in December
Based on weather observations in Cong between 1976 and 2025, these are the recorded extremes during December.
- The hottest December day on record in Cong reached 15°C (59°F) (December 9, 2025).
- Cong experienced its chilliest December day on December 20, 2010, reaching only -4°C (25°F).
- The coldest night in December in Cong was on December 24, 2010, with a minimum of -12°C (10°F).
- The wettest day in December Cong was on December 5, 2015 with 68 mm (2.7 in) of precipitation.
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
pleasant
tolerable
unpleasant
poor
What to Wear in Cong in December
We recommend to layer up for chilly conditions in Cong in December. 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. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Cong 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 Cong's climate page.
Temperature Rainfall Sunshine Humidity
See the full Cong climate overview or explore weather in Ireland.
