First wet, then cold.
Met Éireann has issued a weather advisory for Ireland from midnight on Tuesday until Sunday night.
The weather will turn colder from Wednesday and conditions will become increasingly wintry for the remainder of the week.
There will be a risk of frost and icy conditions in some areas with some falls of sleet and snow at times.
Met Éireann said temperatures overnight during this period may drop as far as -4 degrees in some areas.
On Wednesday night, scattered showers, mainly in the western half of the country, will turn wintry at times, while elsewhere, a frost will set in with good clear spells and lowest temperatures of -2 to 2 degrees.
Thursday will be cool with widespread showers over the western half of the country and more scattered showers further east bringing a risk of hail and wintry showers.
Meanwhile, Status Yellow rainfall warnings are in place for Connacht, Longford, Louth, Westmeath, Meath, Cavan, Donegal and Monaghan until 9pm on Tuesday night.
A Status Yellow rainfall warning is also in place for Antrim, Armagh, Down, Fermanagh, Tyrone and Derry until 12pm on Wednesday.
