The cold snap is set to continue right through the morning (Friday), with some sunny spells and showers developing by the afternoon, according to our friends at Met Éireann.
Temperatures will range from 3 degrees to highs of seven degrees.
On Friday night, it will be cold with frost and ice patches in some regions.
Rain will fall in the South-Western half of the country, with temperatures between -2 to +2 degrees expected.
Met Éireann has said that Saturday morning will see frost and ice dominate and sleet will later develop, spreading from the south-west to the north-east over time.
It will be milder, with higher temperatures of up to ten degrees.
Rain is set to clear eastwards, with a mixed bag of weather including sunshine and showers to follow for the remainder of the day. Temperatures will be slightly milder, reaching up to 12 degrees, with fresh, gusty westerly winds. On Sunday night, there will be heavy rain and a risk of strong winds, Met Éireann has warned.