The Road Safety Authority is urging drivers to be careful of slippery road surfaces.
Met Éireann's issued two status yellow warnings for snow and ice in the entire country across the day.
Frosty conditions are already in place in the North and Northwest of the country, and are due to cover the whole island by evening.
The Road Safety Authority is urging both drivers and people exercising within their 5k to be careful of slippery road surfaces.
Offaly's Cathal Nolan, from Ireland's Weather Channel, says the bad weather will continue throughout the weekend:
Spokesperson Brian Farrell says anyone who is heading out on an essential journey should double check the forecast before setting off: