June 2025 fourth hottest on record with high recorded in Roscommon

Last month was the fourth hottest June on record in the last 126 years, with a county Roscommon weather station recording the month's highest temperature.

The highest temperature was reported at Mount Dillon in Roscommon on Friday, June 20, with a temperature of 29.6 °C (the 2nd highest June max on record (length 15 years)).

The month’s lowest air temperature of 3.5 °C was reported at both Mount Dillon in Roscommon on Monday, June 2, and Mullingar in Westmeath on Sunday, June 8.

The month’s lowest air temperature of 3.5 °C was reported at both Mount Dillon in Roscommon on Monday, June 2, and Mullingar in Westmeath on Sunday, June 8.

The final third of the month has been remarkably hot for Europe, when an intense area of high pressure built over mainland Europe, provoking heatwave conditions to develop over it.

While this happened over mainland Europe, Ireland stayed on the cloudier northern edge of the heat dome, which brought some uncomfortably high night time temperatures, contributing to the high June temperatures overall.