2025 was the second warmest year on record in Ireland since 1900, Met Éireann said in its 2025 annual climate statement, published on Tuesday, January 6.

The last four years (2022 - 2025) are now the top four warmest years on record in Ireland.

“The warming trend is very clear with the last four years being the warmest four years on record in Ireland, since 1900," Met Éireann climatologist Paul Moore said.

"2025 saw not only our warmest spring, but also our warmest summer on record, with high nighttime temperatures contributing to the summer record.

"We experienced five named storms in 2025, as well as a number of impactful rain events. The continued warming brings with it the increasing risk of severe weather events.”

2025 Annual Climate Statement:
👉Second warmest year on record in Ireland
👉2022-2025 now the 4 warmest on record
👉Warmest spring and summer on record
👉4th wettest autumn on record
👉Storm Éowyn brought the highest winds on record
More details here - https://t.co/5JLfuHxXMp pic.twitter.com/BJSH1siDfT

— Climate Services @ Met Éireann (@METclimate) January 6, 2026

According to Met Éireann, the average annual air temperature for Ireland in 2025 was 11.14 °C, which is 1.59°C above the 1961-1990 long-term average (LTA) or 0.97°C above the most recent 1991-2020 LTA.

This makes 2025 the second-warmest year on record, placing it only slightly behind the warmest year - 2023 (11.21 °C) - and only the second time with a mean over 11 °C.

The last four years (2022-2025) are now the four warmest years on record, with 2024 tying 2007 for the fourth warmest; seven of the top ten warmest years have occurred since 2005.

The coldest year on record in Ireland was in 1919, with 8.73 °C. Of the top ten coldest years, none have occurred since 2000.

Provisionally, rainfall data suggests 2025 was the 15th wettest year since 1941, having reached 104% of the 1991-2020 LTA, with an observed average of 1,338.7 mm.

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Extreme values in Ireland 2025

Rainfall

  • Highest annual total: 1809.4 mm at Valentia Observatory, Co Kerry (110% of its LTA) 
  • Lowest annual total: 804.2 mm at Dublin Airport, Co Dublin (104% of its LTA)
  • Highest daily rainfall: 66.9 mm at Johnstown Castle, Co Wexford (58% of its monthly LTA) on Friday, November 14 (associated with Storm Claudia)

Temperature

  • Highest mean annual temperature: 11.9°C at Sherkin Island, Co Cork (0.8°C above its LTA) (its warmest year since 2007)
  • Lowest mean annual temperature: 9.9°C at Knock Airport, Co Mayo (1.1°C above its LTA) (its warmest year on record (length 22 years))
  • Highest air temperature: 31.1°C at Mount Dillon, Co Roscommon on Saturday, July 12 (its second highest max on record (length 17 years)) 
  • Lowest air temperature: -7.6°C at Athenry, Co Galway on Thursday, January 9 
  • Lowest grass minimum: -11.8°C at Mullingar, Co Westmeath on Thursday, January 9

Sunshine

  • Highest annual total: 1721.4 hrs (daily mean 4.72 hrs/day) at Johnstown Castle, Co Wexford
  • Lowest annual total: 1348.0 hrs (daily mean 3.69 hrs/day) at Valentia Observatory, Co Kerry
  • Highest daily sunshine for the year: 15.7 hours at Malin Head, Co Donegal on Saturday, July 12

Related: Weather