The powerful March storms that drenched Hawaii produced more than 2 trillion gallons of rain and pushed precipitation levels to as much as 3,000% above normal in a 14-day period for this time of year.
The country recorded an average of 493mm of rain this autumn, making it the fourth wettest in 85 years of records for Ireland, according to preliminary Met Éireann data from 25 weather stations. In its latest seasonal climate report, the national forecaster said autumn 2025 was very wet but mild. September was relatively cool and wet. It was followed by a mild, dull, and wet October, with Storm Amy bringing widespread heavy rain and the windiest period of the season.
The guidance - updated in March of this year - explained how 2024 was the hottest year on record globally and how Ireland's temperature has increased by nearly 1.1C since 1900. It said: "Climate change is adding fuel to storms due to warmer waters and more moisture in the atmosphere." The document added that sea level rise was expected to increase surges during periods of severe weather and increase the risk of coastal flooding.
