Despite a cool start to the month, June 2025 ended up being Ireland’s 4th warmest June on record, according to provisional data from Met Éireann.

All weather stations across the country reported mean temperatures above the 1991–2020 long-term average (LTA), with Mount Dillon in County Roscommon recording the highest temperature of the year so far – a sweltering 29.6°C on Friday 20th June.

It wasn’t just the heat that stood out — rainfall was also a major feature. Most parts of the country saw wetter-than-normal conditions, with overall rainfall for the month coming in at 117% of the long-term average, making June 2025 the 24th wettest since records began in 1941.

Met Eireann climate summary — Credit **Met Éireann**

A Month on the Edge of a European Heatwave

While an intense high-pressure system settled over mainland Europe during the final third of the month, pushing temperatures well into heatwave territory there, Ireland sat on the cooler, cloudier northern edge of the system. Even so, that proximity was enough to bring some uncomfortably warm nights, adding to the overall temperature increase for the month.

Key Climate Stats – June 2025 at a Glance

Fourth Warmest June on Record: With an average temperature of 15.10°C, June 2025 ranks 4th in the 126-year temperature record for the island.
Warm Trend Continues: This was the fourth consecutive month to place in the top 8 warmest on record for its respective month.
Recent Years Dominating the Charts: Five of the ten warmest Junes on record have occurred in the past two decades — 2023, 2018, 2025, 2010, and 2006.
Temperature Departures:
- +1.88°C above the 1961–1990 long-term average
- +1.42°C above the more recent 1991–2020 baseline
Rainfall: The country saw an average of around 100 mm of rain in June, placing it as the wettest June since 2022.