Met Éireann has issued a yellow rain warning tomorrow with parts of the country expected to get up to 35mm.
Persistent showers across the eastern coast will lead to rainfall accumulations of 25 to 35mm in Dublin, Louth, Wicklow and Meath.
The warning is valid from Tuesday, November 20 from 12:00 to Wednesday, November 21 at 12:00.
Tomorrow will be cold with top temperatures reaching only 6 degrees.
On Tuesday night, showers or longer spells of rain will continue, "heaviest and most frequent over the eastern half of the country". The best of any clear spells will be further west, with ground frost possible in places. Lowest temperatures of 1 to 5 degrees with moderate to the fresh east to northeast breezes.
Wednesday will be cold and mostly cloudy, with showers or longer spells of rain in many areas, but heaviest in the east.
There is a high probability of hail and a risk of thunder during the day with top temperatures of 5 to 8 degrees,
On Wednesday night, showers will continue in the east and south but will die out elsewhere. It will be very cold on with lowest temperatures of 0 to 4 degrees with frost in places.