A cold weather warning remains in place until 10am today as temperatures were as low as -4 degrees in some areas of Dublin overnight.
However, Met Éireann is predicting that the frost and ice will give way to rain and sleet later on Tuesday. Its forecast on its website reads:
"Dry in most areas this morning, with frost and ice in parts of the midlands, east and north, clearing gradually.
"Rain will move in across Atlantic coastal counties and will extend gradually eastwards during the morning and afternoon, turning to sleet in some areas, mainly in the north and northeast, with hill snow.
"Clearer conditions will follow later his afternoon and this evening, with showers in Atlantic coastal counties. Becoming breezy, with freshening southerly winds, later veering west to northwest with the clearance.
"Maximum temperatures will range from 3 or 4 degrees in the north and northeast to between 8 and 10 degrees along southern and Atlantic coasts.
This morning, motorists are urged to be wary of icy roads around the country. In Dublin, traffic is very heavy on the M50 northbound after an incident at Kilternan.