A status yellow snow and ice warning has been issued for 18 counties.
Met Éireann has issued the alert, predicting wintry falls with some accumulations possible.
The warning covers all of Connacht, Donegal, Monaghan, Cavan, and all Leinster counties, except Wexford and Kilkenny and will come into effect from 6am on Sunday, lasting until 6pm.
Status Yellow - Snow/Ice warning for Connacht, Cavan, Monaghan, Donegal, Dublin, Carlow, Kildare, Laois, Longford, Louth, Wicklow, Offaly, Westmeath and Meath.
Wintry falls with some accumulations possible.
Valid: 06:00 Sunday to 18:00 Sunday 31/01/2021https://t.co/l8JdKfwZt9 pic.twitter.com/hygv4fb1rJ— Met Éireann (@MetEireann) January 30, 2021
This follows an earlier yellow rain warning for Wexford and Wicklow today, with up to 40 millimetres of rain expected to fall between 3am and 3pm.
A weather advisory has also been issued for the entire country as a period of unsettled weather moves across Ireland bringing wet and windy conditions and a risk of localised flooding.
The country-wide advisory will last until midnight on Sunday.
