Weather in Dublin 🇮🇪
Monthly weather averages & travel planning
December
Avg Temp
8°C
Rain Days
13 days
Sun Hours
4 hrs
Humidity
65%
Europe › 🇮🇪 Ireland › Dublin
Updated: March 2026
Is December a Good Time to Visit Dublin?
2/10
Avoid
December is a avoid time to visit Dublin (2/10). Average highs of 8°C and 4 sunshine hours daily make conditions workable, though not exceptional. December suits travellers visiting for indoor culture, food, and architecture rather than outdoor activities. Pack accordingly for 13 potential rain days. January offers a similar profile at lower hotel rates if dates are flexible. The 8°C highs require proper cold-weather clothing; many visitors underestimate how far the wind chill drops the perceived temperature, particularly near water or at elevated viewpoints. Planning tips: most accommodation categories have availability, and last-minute deals are common. The quieter streets and shorter queues can make this a genuinely enjoyable time to visit for the right type of traveller. Budget-conscious visitors will find the best value of the year in this period.
vs November:10°C avg high
December sits at a particular moment in Dublin's seasonal arc. Temperatures average 8°C during the day, placing this month in the cooler half of the annual cycle, though milder than the hardest winter months. Against the seasonal backdrop, 13 rainy days and 4 sunshine hours per day help calibrate expectations for what actually awaits on the ground.
8°C
46°F
Avg High
4°C
39°F
Avg Low
13 days
76 mm total
Rain Days
4h
per day avg
Sunshine
65%
Moderate
Humidity
Temperature in Dublin in December
The narrow 4°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. The UV index of 1 is low, meaning sun exposure is minimal concern and sunscreen is largely optional. Average wind speeds of 26 km/h add a meaningful windchill factor, making the 8°C temperature feel cooler than it reads. In Fahrenheit: 46°F average high, 39°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Dublin in December
Morning4°CBefore the day warms up
Afternoon8°CPeak daytime temperature
Evening7°CAfter sunset cools down
Packing for Dublin in December means dressing for 8°C days and 4°C evenings. Layering is key: a thermal base, mid-layer fleece, and a windproof outer jacket for 8°C highs that feel colder in the wind. Evening temperatures settle at 4°C, a modest 4°C drop that a light cardigan or denim jacket covers. European cobblestones reward low-profile walking shoes over flip-flops or heels, with cushioned trainers or leather walking shoes being the practical choice. With 13 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes.
Local tip: Dublin's cobbled streets turn slippery in the rain. Waterproof walking shoes with a non-slip sole outperform fashionable footwear on wet stone, and you'll cover significantly more ground in comfort.
Events in Dublin in December
December has no major festivals or public holidays in Dublin, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Dublin in December
Based on 8°C average highs and 13 rainy days
- Warm jacket (down or fleece)
- Merino wool base layer (regulates temperature and resists odour)
- Sweaters and lined trousers
- Scarf and lightweight gloves
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Dublin in December
- Vigorous walking tour of the UNESCO heritage districtMidday (12-2pm)The 8°C peak temperature provides ideal conditions for brisk sightseeing walks
- Cycling the riverside or park circuitAfternoon (1-4pm)Cool dry air makes long cycling sessions comfortable without overheating
- Explore hilltop viewpoints and fortressesMorning for clear viewsCold-weather atmospheric clarity gives the longest sightlines of the year
- Open-air Christmas or seasonal marketsAfternoon into eveningCool temperatures make festive outdoor markets genuinely atmospheric
- Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 13 rain days expected, having a full-day indoor plan is practical insurance
- Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
- Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningDecember brings distinct seasonal changes to public green spaces worth exploring
- Warm up with traditional hot dishes: local stew, fondue, or braised specialities at a neighbourhood restaurantLunch (12-2pm) or dinner (7-9pm)Cold-weather cuisine is a genuine cultural experience and the best local restaurants serve their heartiest dishes in cooler months
Why is Dublin cool in December?
In December, Dublin feels the full influence of the continental polar air mass, which dominates mid-latitude interiors during winter. Cold, dry air from the north suppresses temperatures to 8°C during the day, dropping further to 4°C at night when radiative cooling is greatest. Precipitation tends to be low, as the cold air holds little moisture. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Dublin in December
In December, Dublin experiences average highs of 8°C (46°F) and lows of 4°C (39°F). Expect around 13 rainy days and 4 hours of sunshine per day, with humidity averaging 65%. The 4°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an extra jacket is essential for evenings. UV exposure is moderate at index 1.
Dublin typically sees 13 rainy days in December, with total precipitation of around 76mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Dublin typically sees 4-6 fewer rain days than December.
Pack a heavy winter coat, thermal underlayers, waterproof insulated boots, and accessories including hats, gloves, and a scarf for Dublin in December. Temperatures regularly fall to 4°C and rarely climb above 8°C during the day. Layering is the key strategy: a base layer, mid-layer insulation, and a windproof outer shell provide flexibility as you move between heated indoor spaces and cold outdoor streets.
December can be a challenging time to visit Dublin due to cold temperatures that rarely climb above 8°C. Indoor attractions, cultural sites, and covered markets are the strongest options this month. If your dates are flexible, the drier or milder months offer significantly easier travel conditions.
The average high temperature in Dublin in December is 8°C (46°F), and the average low is 4°C (39°F). The mean daily temperature is approximately 6°C (43°F). The day-to-night range of 4°C is narrow, typical of coastal or maritime cities. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Dublin is generally May. May offers the most sunshine at 11 hours per day. Average temperatures reach 15°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around May gives you the best chance of dry, bright weather.
December is shoulder or low season in Dublin, meaning fewer tourists and generally lower prices than peak months. With 4 sunshine hours and 13 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In December, Dublin suits a range of activities thanks to cold temperatures of 8°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. Cosy cafes and cultural venues make ideal retreats on overcast days.
December ranks 12th sunniest of the year in Dublin, with an average 4 daily sunshine hours. The driest months are February, March, and September. July is the hottest month (19°C avg high); January is the coolest (8°C). From here, temperatures fall 0°C into January. Compared to last month (November: 10°C high, 13 rain days), December is cooler and equally dry. December is one of the least sunny months, but that often means lower prices and fewer fellow tourists.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 8°C | 4°C | 13 | 4h | View |
| February | 8°C | 3°C | 12 | 6h | View |
| March | 10°C | 4°C | 12 | 8h | View |
| April | 12°C | 6°C | 14 | 10h | View |
| May | 15°C | 8°C | 14 | 11h | View |
| June | 17°C | 11°C | 13 | 11h | View |
| July | 19°C | 13°C | 15 | 10h | View |
| August | 19°C | 13°C | 14 | 10h | View |
| September | 17°C | 11°C | 12 | 8h | View |
| October | 13°C | 9°C | 12 | 6h | View |
| November | 10°C | 6°C | 13 | 5h | View |
| December | 8°C | 4°C | 13 | 4h | View |
January
13 rain days, 4h sun
8°4°
February
12 rain days, 6h sun
8°3°
March
12 rain days, 8h sun
10°4°
April
14 rain days, 10h sun
12°6°
May
14 rain days, 11h sun
15°8°
June
13 rain days, 11h sun
17°11°
July
15 rain days, 10h sun
19°13°
August
14 rain days, 10h sun
19°13°
September
12 rain days, 8h sun
17°11°
October
12 rain days, 6h sun
13°9°
November
13 rain days, 5h sun
10°6°
December
13 rain days, 4h sun
8°4°
Other Months in Dublin
Plan Your Trip to Dublin
Nearby Destinations
Cities within 500 km with comparable weather conditions
Data Sources for Dublin
Climate normals represent 30-year averages (1991-2020). Individual years may vary.