Stay indoors tonight, or wrap up warm if you go out this evening, as Met Eireann has issued a low temperature warning.
The warning will remain in effect from 9pm tonight until 10am on Monday morning.
Temperatures are set to fall to as low as minus 4 degrees tonight, and even as far as minus 6 degrees on Sunday night.
Frost and ice will develop in many places overnight, and dense fog towards dawn will create hazardous driving conditions in the morning.