Wicklow has been included in Snow and Ice Weather Warning which comes into effect tonight from 10pm.
Donegal, Leitrim, Mayo and Sligo have also been included.
It will be cold tonight with scattered showers and some clear spells. Further wintry falls are likely, mainly on higher ground, with the continued risk of hail and thunder. The showers will gradually become more isolated later in the night. Lowest temperatures of -1 to +2 degrees in fresh and gusty northwest winds, with frost and ice patches forming in sheltered areas.
The warning was issued by MET Eireann this afternoon and is valid until 11am on Wednesday.