Tuesday will start off bright and sunny with highs of 20C expected, however the mercury will nosedive to a chilly 2C tonight.
Temperatures will reach highs of 14C to 20C today with the mid-west experiencing the warmest weather.
But while the morning will start off pleasant, forecasters have warned that cloud and "scattered heavy showers" will set in later.
Looking ahead to tonight, a Met Eireann forecaster said: "Mainly dry and clear overnight with light breezes.
"A cool night with lows of 2C to 5C and a touch of grass frost for a short time around dawn."
Irish weather forecast: Torrential rain to hit Europe as Ireland stays in the clear
Meanwhile, similar conditions are expected on Wednesday, a few showers but otherwise dry and bright with good sunshine.
Thursday will see a dry morning in Leinster and Ulster, however, showers will spread from the west and south throughout the day.
A forecaster said: "In the afternoon the rain will break up into showers; the east and north will remain mainly dry except for the odd shower.
"Highs of 13C to 16C, best across Ulster and north-Leinster. Light breezes."
The weather pattern will continue into Friday with another bright and sunny day but some heavy showers will break out in the afternoon /evening.
Highest temperatures will hit 15C to 19C with light northwest winds.
