A status yellow snow and ice warning is in place for 18 counties.
It covers all of Connacht, Donegal, Monaghan, Cavan, and all Leinster counties - except Wexford and Kilkenny - and is in place until 6 this evening.
Met Éireann said it will be a cold and breezy day with widespread rain, sleet and snow.
Some temporary accumulations are possible over the northern half of the country before turning to rain later in the day.
