Met Éireann is predicting temperatures will drop as low as -5 tonight, but that we won't see any more snow.
The North-West was the worst affected in the last 24 hours with heavy snowfalls in areas including Cavan and Donegal.
Conditions are expected to be cold, dry and bright in most places today.
Forecaster Joanna Donnelly said the weather was fairly standard for January.
She said: "Very low temperatures ovenight tonight of down to -5C, and not particularly warm today with temperatures of 4C to 7C, and similar tomorrow.
"It's actually quite typical for the time of year. It's not particularly cold - it just feels like it in contrast to the mild conditions up to Christmas."
Met Éireann said tonight would be dry apart from patchy rain or drizzle in the southwest. It will be very cold again under clear skies and patches of freezing fog will form.
And beware - there will be a severe frost with ice on untreated surfaces.