Leitrim has been issued a status yellow ice and snow weather warning.
This warning comes into effect from 2 o'clock tomorrow morning and will also affect Sligo and Donegal.
It will end at 2 o'clock in the afternoon.
Met Éireann has warned of poor visibility and difficult traffic conditions.
Cathal Nolan from Ireland's Weather Channel expects areas of higher ground to be worst affected:
Meanwhile, Met Éireann has added a number of counties to a status yellow warning for rainfall, active from tonight.
All of Leinster along with Cavan, Monaghan, Cork, Tipperary and Waterford are included.
The warning begins at 11pm tonight and will run for 24 hours.