October 2025 was generally mild, wet and dull over Ireland, but Donegal was particularly unsettled with rainfall recorded during 25 of the month’s 31 days.

The most intense weather occurred around Storm Amy on Friday 3rd and Saturday 4th when Malin Head recorded its highest October 10-minute mean wind speed for 65 years, 111 kilometres per hour, with gusts to 148 kilometres per hour.

The early part of the month was dominated by Atlantic low pressure that steered a warm, moist tropical air mass over the country. Hurricanes Humberto and Imelda in the Atlantic helped intensify the jet stream and fuel Storm Amy, which passed close to the northwest coast before moving towards northern Scotland.

In the wake of the storm, high pressure gave a brief period of mild and relatively dry weather, although rain subsequently returned on Saturday 18th as Atlantic systems took hold once again. Donegal remained in the grip of such systems for much of the remainder of the month, keeping rainfall persistent and winds strong.

In its climate summary for October, Met Éireann says October was warmer than average with a national mean temperature of 11.61 degrees Celsius. The highest temperatures of 19.7 degrees were recorded at Shannon Airport, Phoenix Park and Dublin Airport in the first week of the month. The lowest minimum of 1.0 degree was recorded at Athenry, County Galway on 29th October. Sunshine was below average nationwide, with the dullest conditions at Malin Head, County Donegal.

Most stations reported rainfall totals above average. Valentia Observatory received 198.1 millimetres, 115 per cent of its long-term average. Malin Head’s persistent rain ensured it was one of the wettest parts of the country, with 25 wet days contributing to high monthly totals.