Climate averages 1991–2020
Dublin weather
in October.
A cool, moderately wet month: the 6th warmest and the joint 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a cool month in Dublin: daytime highs average 13.3°C and nights cool to about 8.6°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 78 mm of rain on roughly 12 days, which makes October a moderately wet month (the joint 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 38 min on an average October day.
The nearest other city in this atlas is Tallaght (10 km away). In October its highs average 12.8°C, about as warm as Dublin, with 78 mm of rain.
Among the 5 cities listed in Ireland, Dublin ranks 3rd of 5 for the warmest October highs and joint 1st of 5 for the driest October (rainfall, lowest first). The mean October high of those 5 cities is 13.3°C; Dublin is level with that mean.
From October to November, average highs fall by 3.3°C to 10.0°C, and monthly rainfall rises from 78 mm to 85 mm.
The annual picture
October 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, selected | 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 | 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
October in nearby cities
- Tallaght in OctoberIreland · 10 kmHigh 12.8°C · Low 8.0°C · 78 mm rain
- Lisburn in OctoberUnited Kingdom · 133 kmHigh 12.5°C · Low 8.3°C · 86 mm rain
- Belfast in OctoberUnited Kingdom · 142 kmHigh 12.8°C · Low 9.0°C · 86 mm rain
- Douglas in OctoberIsle of Man · 147 kmHigh 13.1°C · Low 11.0°C · 117 mm rain
- Limerick in OctoberIreland · 175 kmHigh 13.4°C · Low 8.2°C · 89 mm rain
- Galway in OctoberIreland · 186 kmHigh 13.1°C · Low 8.3°C · 95 mm rain
- Derry in OctoberUnited Kingdom · 198 kmHigh 12.3°C · Low 8.0°C · 88 mm rain
- Southport in OctoberUnited Kingdom · 217 kmHigh 13.3°C · Low 9.3°C · 137 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.