Unseasonable 'wet snow' and sleet has been forecast for parts of the country on Monday.
Parts of Ulster and Connacht are expected to be hit by the unseasonable cold spell, Met Eireann have warned.
The cold front comes just days after the country basked in warm temperatures of up 20 degrees and glorious sunshine.
However, it came to an abrupt halt this weekend.
Temperatures are expected to dip to minus one degrees tonight with some frost expected to form in some places, according to Met Eireann forecasters.
Showers will be the order of the day for Sunday with temperatures ranging between eight and twelve degrees, and plummeting to minus four overnight.
Monday will be a cold blustery day with widespread showers particularly affecting Connacht, Ulster and west Munster. Wintry showers are being forecast for the west and northwest, with some "wet snow" expected to affect lower levels here. Temperatures will range between six and nine degrees, but with a gusty northwest wind, it will feel even colder.
Tuesday will show a slight improvement with temperatures increasing to 11 degrees, but outbreaks of rain are expected across the country.
Wednesday is expected to be a another cold and wet day with highest temperatures of between just six and ten degrees.
Might be best to take down those winter woolies from the attic....