A status yellow ice warning is set to come into effect from six o'clock this evening.
Icy stretches are forecast nationwide, with hazardous conditions expected for some areas.
Alan O'Reilly from Carlow Weather says temperatures will plummet over the next day or two.
"The entire country has a yellow weather warning for icy conditions from 6pm on Monday to 10am on Tuesday.
"A blast of very cold Arctic air will move down across the country through Monday.
"Once the rain clears it will turn very cold, dropping to as low as -4 degrees."
