Snow accumulations of 3cm is expected, with larger amounts on higher ground in Connacht and Ulster, and hail and sleet showers on Sunday.
Three warnings are now in place as the wind caution, which was issued yesterday, will affect Munster, Leinster and Galway.
Gusts of up to 110 km per hour are expected.
Connacht, alongside counties of Cavan, Monaghan and Donegal have been given rain warnings, registered as status yellow as well.
"Next week, the weather will remain in its changeable phase, going between milder and colder spells with further spells of snow".More news: Activision Blizzard, Inc. (NASDAQ:ATVI) Shares Bought by Rathbone Brothers plc
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"A covering of snow as we begin Sunday across the higher grounds of the north of England and central and southern Scotland". Maximum temperature 3 °C. Towards evening, rain will develop in the west.
But today, temperatures in the day will reach a maximum of around 9 degree Celsius, with a few outbreaks of rain from the west this morning.
"On Sunday night, wintry showers will continue with accumulations of snow in places".
The temperatures will reach highs of 1C to 4C, with moderate to fresh westerly winds. However, persistent or heavy rain will spread from the west through the late afternoon and evening. On Tuesday night, frost and ice will develop for a time.
While Monday is forecast to be relatively calm, it is expected to be followed by four days of heavy rain and bitter winds across the country.