Met Éireann says the possible impacts include localised flooding, difficult travelling conditions, and poor visibility.
A weather warning for rainfall tomorrow in Kildare has been issued by Met Éireann.
It affects the entire east coast, most of the midlands, and part of the south coast.
The warning begins at 4 o'clock on tomorrow morning and will remain active into the early hours of Wednesday.
Met Éireann says the possible impacts include localised flooding, difficult travelling conditions, and poor visibility.