ICE and snow have made an unwelcome return as freezing overnight temperatures caused dangerous road conditions.
Drivers were told to be extremely cautious this morning as they encountered the worst frost since January's big freeze.
The council's street gritters were out in force again as the sub-zero levels caused ice and frost in many places.
The country has entered another cold spell, with temperatures expected to to fall to as low as -5C tonight.
AA Roadwatch warned motorists to proceed with extreme care after the frozen conditions affected many parts of Dublin and beyond.
Met Eireann said there will be wintry showers tonight before the skies clear and the temperatures drop further.
Throughout next week temperatures are not expected to get above 6C during the day and they will be between -2C and -6C at night.
"The days will often be bright and sunny but there will also be wintry showers occurring right through the week," Met Eireann added.
A widespread return to snowy conditions is forecast for the end of the week, with rain falling as snow over Ireland.
Met Eireann issued a weather warning for the weekend, with up to 5cm of snow expected in low-lying parts of Munster and south Leinster and up to 10cm at higher levels.
Snow showers fell yesterday over western parts of Munster, into Connacht and over Ulster.
Co Mayo was transformed into a "winter wonderland".