Temperatures are set to fall below freezing in most parts of the country tonight.
Met Éireann has issued a Status Yellow cold weather and ice warning for all Leinster, Munster and Connacht as well as counties Cavan and Monaghan.
The warning came into effect at 9pm and will remain in place until 11am tomorrow morning.
Frost and fog patches will be slow to clear.
Met Éireann forecaster Joanna Donnelly warns there will be icy stretches on untreated surfaces.
Temperature forecast for the next 24 hours pic.twitter.com/aN0uqLbw1l
— Met Éireann (@MetEireann) January 18, 2020
"As soon as it gets dark really we are going to see temperatures drop very quickly to below freezing
"Temperatures will then gradually sink through the night as the skies will be clear.
"We are expecting temperatures as low as -4°C again tonight, maybe lower in local spots."
With freezing temperatures overnight, motorists are advised to take additional care on the roads.
The Road Safety Authority has advised people to drive slowly on the roads throughout the night and into the morning.
Road users are advised to be aware of potential black ice on the roads and should treat all roads as if they are frozen.