It will remain very cold right up to next Wednesday, Met Éireann has warned.
The forecaster this afternoon extended its winter Weather Advisory into next week.
It said it will remain very cold into the middle of the week due to an Artic airmass bringing “sharp to severe frosts, and ice or black ice on roads and footpaths”.
Meanwhile, showers of hail, sleet, and snow will occur, mainly in coastal counties and freezing fog is likely at times, especially this weekend.
Winds over land will remain generally light.
It comes after snow fell in many areas overnight, leading to hazardous conditions on Irish roads this morning.
The cold snap also impacted on public transport this morning, with many passengers facing cancelled or delayed trains.