People are being asked to remember those who may be vulnerable to the low temperatures.
Frost and ice could be slow to clear from many areas today.
A national low temperature alert is in place until midday as the latest cold-snap continues.
Yellow alerts for snow are also in place for Donegal, Leitrim, Sligo and Mayo.
People are being asked to keep an eye on vulnerable and elderly neighbours.
Matthew Martin from Met Éireann says motorists should be prepared for difficult travelling conditions:
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