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Derry Weather in December
Derry in December sees low temperatures, with highs around 9°C (48°F) and overnight lows of 3°C (37°F). Rainfall is fairly high at around 99 mm (3.9 in) on average, so pack waterproofs just in case.
Rainfall in Derry in December
Typically, you can expect about 23 days of rain this month, with 99 mm (3.9 in) on average. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.
Temperature in Derry in December
Daytime highs in Derry in December reach 9°C (48°F), with nights around 3°C (37°F). December marks the winter season. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. Nights drop to 3°C (37°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Derry in December
With limited sunshine this month, there are about 39 hours of sun. It's ideal for those who prefer a cooler, cloudier climate.December in Derry has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Derry Temperature in December
Min Temperature
3°C (37°F)
Max Temperature
9°C (48°F)
Chance of Rain
76%
Precipitation
99 mm (3.9 in)
Rainy days
23 days
Sunshine
39 hours
Percentage Sunshine
Derry Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Derry - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Derry 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 Derry in December
Browse day-by-day weather records for Derry spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Derry historical weather extremes in December
Based on weather observations in Derry between 1976 and 2025, these are the recorded extremes during December.
- On December 9, 2025, temperatures climbed to 17°C (63°F), marking the warmest December day on record.
- The lowest daytime temperature in December was -4°C (25°F), recorded on December 21, 2010.
- Nighttime temperatures dropped to -11°C (12°F) on December 27, 1995, marking the coldest December night on record.
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
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 Derry in December
We recommend to layer up for chilly conditions in Derry 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. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.
What To Do in Derry 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 -
Camping4/10 -
Outdoor sports4/10
Derry 3-Day Forecast
More climate data for Derry
See the full Derry 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) Bucket list
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