Met Éireann is forecasting overnight temperatures dropping to -3C in places with a widespread sharp to severe frost forming, with some ice patches.
There will be scattered wintry showers clearing the south overnight with further wintry showers moving into the north with a risk of isolated thunderstorms here.
Tomorrow will be cold with wintry showers skirting northwestern and northern coasts in the morning with showers of rain, hail and sleet developing and becoming widespread later in the day with a risk of thunderstorms too.
There will be some snow showers also, especially over higher ground. The showers will become isolated later.