A Status Yellow ice and snow warning has been issued for Ireland by Met Éireann.
It comes into effect at 11pm tonight and will remain in place until 6am on Monday.
The forecaster has said scattered thundery showers of hail, sleet and snow can be expected for the period.
Motorists have been warned they may experience poor visibility on the roads, with slippery and icy conditions.
Nationwide: Snow-ice warning for all counties from tonight to Monday. Poor visibility and slippery conditions expected on the roads. Slow down and make sure to leave extra space between your vehicle and the one in front. #slowdown pic.twitter.com/i5aa8mhubA— An Garda Síochána (@GardaTraffic) March 9, 2019
Sleet and snow is expected to spread north over the country tonight, with wintry showers due to continue through much of Sunday.