Irish national weather forecaster Met Éireann issued a fresh yellow warning for snow and ice on Monday afternoon for the entire country until 06:00 local time on Friday.
An orange warning for low temperatures and ice has been issued for 22 counties, due to come into effect at 20:00 until 10:00 on Wednesday.
The warning is for Carlow, Kildare, Kilkenny, Laois, Longford, Meath, Offaly, Westmeath, Wicklow, Cavan, Monaghan, Munster and Connacht.
A separate orange warning for low temperatures will come in at 18:00 on Wednesday and will last until 11:00 on Thursday morning.
That warning is for Dublin, Louth and Wexford.
