Dublin weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: June – September
What is the weather like in Dublin in December?
In December, Dublin is cold: daytime highs average 8 °C, and nights cool down to about 5 °C. The sea averages 10.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 12 rainy days and 70 mm in total. All in all, December is not an ideal month for a holiday in Dublin.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 23 | 14 | 13 |
| Day | 10° | 8° | 8° |
| Night | 7° | 5° | 4° |
| Sea | 12° | 11° | 9° |
| Sun | 3 h | 3 h | 3 h |
| Rain days | 13 | 12 | 12 |
More details for December
- Daylight
- 7 h 33 min08:33 – 16:07
- UV index
- 0 · lowclear sky, noon (estimate)
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 26 km/haverage daily peak
- Cloud cover
- 73 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+0Europe/Dublin
How the score comes together
- Temperatureweight 50 %3 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 30 %41 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Warm jacket
- Rain jacket or umbrella
Dublin in December: quick answers
Is Dublin hot in December?
No. In December, Dublin is cold: daytime highs average 8 °C and nights drop to about 5 °C.
Can you swim in Dublin in December?
Only if you don't mind cold water: in December the sea averages just 10.6 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Dublin in December?
Rain is frequent, with about 12 rainy days and 70 mm in total.
Dublin month by month
The whole year in DublinAll destinations: Ireland
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)