A Status Yellow rain warning has been issued for 18 counties by Met Éireann.
The national forecaster has also issued warnings for localised flooding, leading to difficult travel conditions.
Taking effect at 4am, this warning will expire at 4am on Wednesday, and includes all of Leinster, Monaghan, Cavan, Leitrim, Roscommon, Tipperary and Waterford.
“Potential impacts include localised flooding, difficult travelling conditions and poor visibility", the national forecaster said.
Met Éireann confirmed this news on social media. See more on this here.
Looking to the week ahead, Met Éireann have predicted a washout for most the country, with the West still expected to avoid a lot of the heavy rain.
Outbreaks of rain and drizzle have been forecasted for most of Wednesday, with a mix of cloud, sunny spells and scattered showers elsewhere. Munster and Connacht are to receive the best of the sunshine.
Temperatures are to reach 20C, but dropping to between 9 and 13 degrees in a mostly wet night.
Thursday is to also see temperatures drop below 20C for the first time, but only dropping to 19 degrees.
Rain and drizzle has also been predicted for the northern part of the country.
Friday is expected to be dry, with mix of cloud and sunny spells, with some light showers.
The outlook looks positive for the weekend, with temperatures to once again hit 20C, which is to be dominated by high pressure.
Last week, the forecaster also revealed that 2024 saw its coldest June in almost a decade. More on this from Nova here.
