Heavy rain this morning washed away much of the snow and ice that impacted Cork yesterday.
But forecasters at Met Éireann said the cold weather will return tonight.
Heavy outbreaks of rain will continue today, with falls of sleet and snow at times inland.
It will be extremely cold this evening and overnight with brisk northeasterlies and further wintry falls; some snow accumulations possible on lower levels, mainly in the east and southeast of Munster.
"Frost and icy conditions too, all resulting in treacherous conditions. Lowest temperatures of 0 to -3 degrees Celsius," Met Éireann said.