Temperatures are set to drop later tonight, upland areas could see lows of -3.
Severe overnight frost will lead to icy road networks on Sunday morning and again Monday morning.
A risk of coastal showers bringing light mixed wintry showers tomorrow to hills and mountains in Ulster and Leinster.
Yesterday Wicklow Weather issued a climber/hiker advisory for the weekend.
Please keep pets indoors during the next couple of evenings or provide dry shelter with fresh drinking water.
***AVOID UPLAND ROAD NETWORKS***
Dry and clear tonight. Very cold in western parts of the province with lowest air temperatures of -1 to -3 degrees with a widespread sharp to severe ground frost. Temperatures staying slightly above zero further east and between 3 to 5 along the coast due to an onshore northeasterly wind.
A cold, dry day with sunny spells. Highest temperatures 3 to 6 degrees with. Light to moderate easterly winds.