Met Eireann has forecast temperatures to plummet this week and has warned that snow and ice are on the way.
Today will begin as dull and mild but some sunny spells are expected in the afternoon.
Towards evening, a band of more persistent rain will push into the northwest.
There will be highest temperatures of 9 to 13 degrees in moderate to fresh and gusty southwest winds, stronger in western and northwestern coastal areas.
Tonight
Tonight will be mild with temperatures of 5 to 9 degrees.
There will be rain in the northwest that will slowly track southeastwards during the night but it will stay dry for much of east Munster and south Leinster.
Tuesday
Tomorrow will be largely cloudy and there will be light outbreaks of rain and drizzle, mainly over Munster and north Leinster.
There will be drier weather further with some sunny spells developing.
Highest afternoon temperatures of 6 to 9 degrees over Ulster and Connacht, ranging from 9 to 13 degrees elsewhere.
Wednesday
The southern half of the country will have a cloudy start to the day on Wednesday with some patches of light rain lingering.
It will be brighter further north with good sunny spells developing along with scattered showers, mainly over Connacht and Ulster with some falls of sleet and with some snow possible on high ground in Ulster.
There will be highest temperatures of 5 to 7 degrees.
Thursday
Further falls of sleet and possibly snow are expected in Ulster.
There will be highest temperatures of 5 to 8 degrees in mostly moderate west to northwest winds.
It will turn very cold overnight with clear skies as showers become isolated and mostly confined to northern coasts. Lowest temperatures of -3 to +1 degrees with widespread frost and icy developing in light northwesterly or variable breezes.
