Over half of all weather stations recorded their wettest winter on record, according to Met Éireann.
Stations at Dublin Airport and Johnstown Castle in Co Wexford recorded their wettest winters since opening 74 years ago, while the station at Malin Head, Co Donegal recorded its wettest winter since 1885.
All stations recorded rainfall totals that were above long-term averages, with many reporting totals double that of the long-term average.
Temperatures were also above average at almost all stations nationwide, with the largest increase from the long-term average reported on the east coast.
The highest seasonal temperature, 16 degrees celcius, was recorded at Malin Head on 17 December.
The six named storms that hit Ireland during winter, from Desmond to Imogen, brought heavy winds along with torrential rain.
Gusts of 135 km/h were recorded in Belmullet and Sherkin Island during storms Eva and Imogen.
Meanwhile, Storm Jake covered parts of Ireland and the UK in snow overnight, while high winds affected much of the country.
AA Roadwatch is warning motorists to "watch out for wind blown debris and be mindful of pedestrians, cyclists and motorcyclists."
Snow accumulated in parts of Connacht, Ulster and Leinster overnight, with larger amounts falling on higher ground.
Winds of up to 130 km/h also battered coastal areas of the north, west and south during the night.
Tonight temperatures are expected to drop to between 0-3C, with Met Éireann forecasting sharp frost and a risk of ice.
Gardaí reported very poor driving conditions on the M8 Cork to Dublin motorway due to sleet and ice this morning.
The sections between Watergrasshill and the Fermoy toll booths, as well as between Mitchelstown and Thurles were especially bad, they said.
Meanwhile Britain’s Met Office has issued yellow "be aware" warnings for snow and ice for much of northern England and northern Wales, Scotland and Northern Ireland.
Up to 5cm of snow was forecast in many places, rising to 10cm on higher ground.
Snow and ice affected travel in many parts of Northern Ireland including the main Belfast to Dublin route.