Climate averages 1991–2020
Limerick weather
in September.
A mild, moderately wet month: the 4th warmest and one of the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Limerick: daytime highs average 16.5°C and nights cool to about 10.8°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 76 mm of rain on roughly 13 days, which makes September a moderately wet month (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 12 h 44 min on an average September day.
The nearest other city in this atlas is Galway (73 km away). In September its highs average 16.2°C, about as warm as Limerick, with 75 mm of rain.
Among the 5 cities listed in Ireland, Limerick ranks joint 2nd of 5 for the warmest September highs and 5th of 5 for the driest September (rainfall, lowest first). The mean September high of those 5 cities is 16.4°C; Limerick is 0.1°C warmer than that mean.
From September to October, average highs fall by 3.1°C to 13.4°C, and monthly rainfall rises from 76 mm to 89 mm.
The annual picture
September 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
Limerick climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.1°C3.5°C | 3.5°C | 94 | 15.4 | 8.28 h |
| February | 8.6°C3.3°C | 3.3°C | 80 | 13.1 | 9.810 h |
| March | 10.2°C4.0°C | 4.0°C | 76 | 13.5 | 11.812 h |
| April | 12.5°C5.6°C | 5.6°C | 76 | 13.6 | 13.914 h |
| May | 15.2°C8.3°C | 8.3°C | 77 | 14.2 | 15.716 h |
| June | 17.5°C10.9°C | 10.9°C | 77 | 12.6 | 16.817 h |
| July | 18.7°C12.6°C | 12.6°C | 83 | 14.2 | 16.316 h |
| August | 18.4°C12.4°C | 12.4°C | 89 | 14.0 | 14.715 h |
| September, selected | 16.5°C10.8°C | 10.8°C | 76 | 12.7 | 12.713 h |
| October | 13.4°C8.2°C | 8.2°C | 89 | 14.1 | 10.711 h |
| November | 10.2°C5.5°C | 5.5°C | 96 | 15.0 | 8.89 h |
| December | 8.4°C3.9°C | 3.9°C | 99 | 15.0 | 7.78 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
September in nearby cities
- Galway in SeptemberIreland · 73 kmHigh 16.2°C · Low 10.8°C · 75 mm rain
- Cork in SeptemberIreland · 86 kmHigh 16.7°C · Low 11.7°C · 64 mm rain
- Tallaght in SeptemberIreland · 166 kmHigh 16.1°C · Low 10.5°C · 70 mm rain
- Dublin in SeptemberIreland · 175 kmHigh 16.5°C · Low 11.0°C · 70 mm rain
- Lisburn in SeptemberUnited Kingdom · 268 kmHigh 15.6°C · Low 10.6°C · 70 mm rain
- Derry in SeptemberUnited Kingdom · 273 kmHigh 15.4°C · Low 10.4°C · 75 mm rain
- Belfast in SeptemberUnited Kingdom · 279 kmHigh 15.7°C · Low 11.3°C · 70 mm rain
- Douglas in SeptemberIsle of Man · 320 kmHigh 15.1°C · Low 13.1°C · 85 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 Limerick) is explained once on the Limerick year overview and on the Sources, method and limits page.