The new year will get off to a chilly start with icy weather forecast for the rest of the week and a risk of snow across much of the country.
It will stay cold today, with widespread frost and ice expected.
Met Éireann issued a status yellow snow and ice warning for 13 counties from midnight to noon.
Carlow, Kildare, Kilkenny, Laois, Wexford, Wicklow, Offaly, Donegal, Leitrim, Sligo, Cork, Tipperary and Waterford have all been put on alert.
Maximum temperatures today will be 3 to 6 degrees.
Tomorrow will be another cold day, with sunny spells and passing showers.
However, there is a risk of hail and thunder.
The new year could bring more snow as wintry showers are forecast for tomorrow night, with showers mainly confined to western and northern coastal counties.
There will also be wide- spread frost and ice with minimum temperatures of -3 to 2 degrees with fresh north-west winds.
"New Year's Day will dawn cold and frosty," a forecaster said.
"It will be bright with good sunny spells but also some passing showers, possibly wintry on high ground."