A low of minus 8.8 degrees was recorded in Millstreet in Cork last night.
Temperatures are expected to fall to minus 5 degrees in places across Cork again tonight.
Met Éireann has issued an orange level alert for low temperatures and ice for Cork.
The orange warning is in place from 6pm this evening until 12 noon tomorrow
The City Council says it's continuing to salt key commuting and bus routes across the city.
