Two Status Yellow weather warnings have been issued by Met Éireann.
A cold weather warning, which comes into effect at 9pm, will remain in place for 24 hours for the entire country, with temperatures falling to -3C or -4C in many areas.
Meanwhile, a rainfall warning has been issued for Carlow, Kilkenny, Wexford, Cork, Kerry, Limerick, Tipperary and Waterford.
Between 30-50mm of rain is forecast for a 24-hour period beginning tomorrow at 2pm.
Met Éireann is warning of the risk of flooding as a result of the rainfall.
As a result farm animals are being kept indoors longer than normal, with already depleted fodder supplies being put under added pressure.