Limerick weather by month
Limerick runs from about 4°C in January to 15°C in August, with February the wettest month at 172 mm.
warmest month
August
15°C
coolest month
January
4°C
wettest month
February
172 mm
worst air month
August
7 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 4°C | 100 mm | 126 h | 4 |
| February | 8°C | 172 mm | 107 h | 5 |
| March | 8°C | 158 mm | 172 h | 6 |
| April | 9°C | 102 mm | 221 h | 5 |
| May | 13°C | 72 mm | 251 h | 5 |
| June | 13°C | 64 mm | 270 h | 4 |
| July | 15°C | 86 mm | 240 h | 4 |
| August | 15°C | 105 mm | 264 h | 7 |
| September | 13°C | 58 mm | 208 h | 4 |
| October | 11°C | 103 mm | 160 h | 5 |
| November | 9°C | 119 mm | 89 h | 3 |
| December | 7°C | 121 mm | 87 h | 5 |
About 2,195 hours of sun a year. Roughly 126 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-27. Full method, licences and the list of sources we rejected are on the methodology page.