The lowest grass temperature of 2018 was recorded at the Markree weather station in Sligo.
A temperature of -13.2C was documented there on the 20th of March after a spell of snow the day after St Patrick’s Day.
Meanwhile, rainfall exceeded average January levels in all areas last year.
Malin Head in Donegal recorded its highest monthly total of rain since 1885.
Temperatures soared to 32C at the Shannon weather station on June 28th , the highest daily maximum at the airport since 1946.