Met Éireann has issued a status orange low temperature warning for Sunday night, when temperatures are set to fall to as low as –6 degrees in some areas.
The warning was issued for Munster, inland areas of Leinster, and Connacht, as well as counties Donegal, Monaghan and Cavan. It is in place from 9pm on Sunday night to 10am on Monday morning.
The forecaster said Sunday night will be dry and clear but very cold, with severe air and ground frost returning.
“Lowest temperatures will range from –1 near east and south coasts to –5 or –6 degrees well inland,” Met Éireann said. “[There is] a risk of icy patches on any damp untreated surfaces.”
Sunday daytime will be dry and bright with “plenty of winter sunshine”, it said.
Overnight frost will gradually clear during the day. There will be light to moderate winds and highest temperatures of 3 to 7 degrees.
In general, temperatures will remain low until Thursday, when milder conditions are expected.