The lowest temperature reported at a Met Éireann weather station this morning was at Mount Dillon in Co Roscommon, where -7C was recorded at 8am.
The cold snap looks to set to continue into next week.
A status yellow low temperature and ice warning is in place for the entire country until midday today, with Met Éireann warning of hazardous road conditions.
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A yellow alert for snow and ice remains in effect in Co Donegal until midday tomorrow, with scattered sleet and snow showers forecast.
