Temperatures are set to plummet to as low as -4C in Ireland on Sunday night.
Met Eireann is forecasting freezing cold conditions over the next few nights.
And Sunday night is going to be extremely chilly, with many parts of Ireland set to experience subzero temperatures.
How cold will it be in my area?
According to a predicted weather map from Met Eireann, here's cold it will be overnight.
- Midlands -4C
- Clare -1C
- Galway/Mayo 0C
- Cork 0C
- Dublin 1C
- Kerry 1C
- Wexford/Waterford 1C
- Northern Ireland 1C/2C
Meanwhile, a few hail showers will batter some parts of Ireland on Friday, on what will be a chilly but mostly sunny day.
A forecaster said: "Frost will clear on Friday to leave a cold and mostly sunny day with just a few rain or hail showers in eastern coastal counties.
"Winds mostly light north or northeast in direction but moderate along the east coast. Maximum afternoon temperatures ranging 6C to 9C."
Saturday will begin cold and frosty, with rain forecast for the west in the afternoon. The east will remain generally dry.
The forecaster added: "A cold bright start with frost clearing, but fog may linger in places into the afternoon.
"Thickening cloud will bring rain into western counties in the afternoon but the eastern half of the country will hold generally dry. Highs of 4 to 8 degrees Celsius.
"Frost in some eastern areas on Saturday night cloudier with rain at times further west."
