Climate averages 1991–2020
Dublin weather
in December.
A cool, moderately wet month: the 11th warmest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Dublin: daytime highs average 8.1°C and nights cool to about 4.0°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 76 mm of rain on roughly 13 days, which makes December a moderately wet month (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 7 h 37 min on an average December day.
The nearest other city in this atlas is Tallaght (10 km away). In December its highs average 7.6°C, about as warm as Dublin, with 76 mm of rain.
Among the 5 cities listed in Ireland, Dublin ranks 4th of 5 for the warmest December highs and joint 1st of 5 for the driest December (rainfall, lowest first). The mean December high of those 5 cities is 8.3°C; Dublin is 0.2°C cooler than that mean.
From December to January, average highs fall by 0.3°C to 7.8°C, and monthly rainfall falls from 76 mm to 69 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Dublin climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.8°C3.5°C | 3.5°C | 69 | 13.1 | 8.18 h |
| February | 8.2°C3.3°C | 3.3°C | 57 | 12.0 | 9.810 h |
| March | 9.8°C4.1°C | 4.1°C | 59 | 12.2 | 11.812 h |
| April | 11.9°C5.6°C | 5.6°C | 66 | 13.8 | 13.914 h |
| May | 14.7°C8.3°C | 8.3°C | 66 | 13.6 | 15.816 h |
| June | 17.3°C11.1°C | 11.1°C | 73 | 13.2 | 16.917 h |
| July | 18.9°C12.9°C | 12.9°C | 76 | 14.8 | 16.416 h |
| August | 18.6°C12.8°C | 12.8°C | 78 | 13.6 | 14.815 h |
| September | 16.5°C11.0°C | 11.0°C | 70 | 12.2 | 12.813 h |
| October | 13.3°C8.6°C | 8.6°C | 78 | 12.4 | 10.611 h |
| November | 10.0°C5.8°C | 5.8°C | 85 | 13.2 | 8.79 h |
| December, selected | 8.1°C4.0°C | 4.0°C | 76 | 12.8 | 7.68 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Tallaght in DecemberIreland · 10 kmHigh 7.6°C · Low 3.4°C · 76 mm rain
- Lisburn in DecemberUnited Kingdom · 133 kmHigh 7.5°C · Low 3.6°C · 82 mm rain
- Belfast in DecemberUnited Kingdom · 142 kmHigh 7.9°C · Low 4.4°C · 82 mm rain
- Douglas in DecemberIsle of Man · 147 kmHigh 8.9°C · Low 6.6°C · 114 mm rain
- Limerick in DecemberIreland · 175 kmHigh 8.4°C · Low 3.9°C · 99 mm rain
- Galway in DecemberIreland · 186 kmHigh 8.3°C · Low 4.1°C · 104 mm rain
- Derry in DecemberUnited Kingdom · 198 kmHigh 7.4°C · Low 3.4°C · 90 mm rain
- Southport in DecemberUnited Kingdom · 217 kmHigh 7.6°C · Low 4.2°C · 139 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Dublin) is explained once on the Dublin year overview and on the Sources, method and limits page.
Tallaght lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.