Climate averages 1991–2020
Tallaght weather
in May.
A cool, moderately wet month: the 5th warmest and the joint 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a cool month in Tallaght: daytime highs average 14.4°C and nights cool to about 7.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 66 mm of rain on roughly 14 days, which makes May a moderately wet month (the joint 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 50 min on an average May day.
The nearest other city in this atlas is Dublin (10 km away). In May its highs average 14.7°C, about as warm as Tallaght, with 66 mm of rain.
Among the 5 cities listed in Ireland, Tallaght ranks 5th of 5 for the warmest May highs and joint 1st of 5 for the driest May (rainfall, lowest first). The mean May high of those 5 cities is 14.7°C; Tallaght is 0.4°C cooler than that mean.
From May to June, average highs rise by 2.6°C to 17.0°C, and monthly rainfall rises from 66 mm to 73 mm.
The annual picture
May 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
Tallaght climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.3°C3.0°C | 3.0°C | 69 | 13.1 | 8.18 h |
| February | 7.8°C2.8°C | 2.8°C | 57 | 12.0 | 9.810 h |
| March | 9.4°C3.6°C | 3.6°C | 59 | 12.2 | 11.812 h |
| April | 11.6°C5.2°C | 5.2°C | 66 | 13.8 | 13.914 h |
| May, selected | 14.4°C7.8°C | 7.8°C | 66 | 13.6 | 15.816 h |
| June | 17.0°C10.6°C | 10.6°C | 73 | 13.2 | 16.917 h |
| July | 18.5°C12.4°C | 12.4°C | 76 | 14.8 | 16.416 h |
| August | 18.2°C12.3°C | 12.3°C | 78 | 13.6 | 14.815 h |
| September | 16.1°C10.5°C | 10.5°C | 70 | 12.2 | 12.713 h |
| October | 12.8°C8.0°C | 8.0°C | 78 | 12.4 | 10.611 h |
| November | 9.6°C5.2°C | 5.2°C | 85 | 13.2 | 8.79 h |
| December | 7.6°C3.4°C | 3.4°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
May in nearby cities
- Dublin in MayIreland · 10 kmHigh 14.7°C · Low 8.3°C · 66 mm rain
- Lisburn in MayUnited Kingdom · 139 kmHigh 13.8°C · Low 7.7°C · 70 mm rain
- Belfast in MayUnited Kingdom · 149 kmHigh 13.6°C · Low 8.2°C · 70 mm rain
- Douglas in MayIsle of Man · 157 kmHigh 11.7°C · Low 9.3°C · 56 mm rain
- Limerick in MayIreland · 166 kmHigh 15.2°C · Low 8.3°C · 77 mm rain
- Galway in MayIreland · 178 kmHigh 14.8°C · Low 8.2°C · 79 mm rain
- Derry in MayUnited Kingdom · 200 kmHigh 13.8°C · Low 7.6°C · 78 mm rain
- Cork in MayIreland · 209 kmHigh 14.7°C · Low 8.8°C · 67 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 Tallaght) is explained once on the Tallaght year overview and on the Sources, method and limits page.
Dublin lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.