Met Eireann have issued a fresh 24-hour rain warning in three counties as miserable conditions are set to hit.
The Status Yellow alert is in place for Donegal, north Leitrim and Sligo from midnight on Sunday until midnight on Monday.
It reads: "Further showers or longer spells of rain will maintain the risk of localised flooding and hazardous driving conditions."
Meanwhile it will be a mixed day elsewhere with some sunshine and showers in places, with the worst of the wet weather in the northwest and southwest.
A Met Eireann forecaster said: "Showers this morning in Leinster, Ulster and north Connacht. Drier and brighter elsewhere with sunny spells and a few showers. Further showers will develop in west Munster during the afternoon and will continue this evening. Highest temperatures of 15 to 20 degrees in mostly moderate westerly winds.
"Tonight, scattered showers will continue, heaviest and most frequent over the northern half of the country. Lowest temperatures of 9 to 13 degrees with light to moderate west to southwest breezes.
"Monday will be a mostly cloudy day with further showers and some bright or sunny intervals.
"The showers will be heaviest and most widespread through the afternoon, with some thundery and with a risk of localised flooding. It will brighten up from the west through the evening. Highest temperatures of 17 to 20 degrees with light to moderate west to northwest breezes.
"A dry and clear night for most though there will be isolated showers. Lowest temperatures of 9 to 12 degrees. Light westerly breezes will allow mist and fog patches to form."
And next week looks set to bring a change as it will be drier on Tuesday with highs of 21C, although a band of rain could bring some showers on Wednesday morning, but it is expected to clear by the evening.
A forecaster added: "A largely dry day with a mix of cloud and sunny spells with just some light showers about. Feeling rather pleasant with highest temperatures of 17 to 20 degrees, possibly reaching 21 degrees along eastern coasts, in light southwesterly breezes. During the evening, some patchy drizzle will develop along Atlantic coasts
"A largely dry night with clear spells but cloud will push in from the Atlantic ahead of a band of rain moving in Atlantic coastal counties by dawn. Mild with temperatures not falling below 12 to 15 degrees in moderate southerly winds.
"The persistent and locally heavy band of rain will gradually track eastwards through Wednesday, clearing into the Irish Sea by the evening. Behind the rain, sunshine will follow along with isolated showers. Highest temperatures of 17 to 20 degrees, mildest in the east and south. Moderate southerly winds will veer westerly during the day."
"Some uncertainty for Thursday with a low pressure system set to track near Ireland. Current indications suggest that it will be a day of sunny spells and well scattered showers but there is the potential for windy conditions to develop. Highest temperatures of 17 to 20 degrees.
"Current indications suggest that it will continue unsettled through Friday and the weekend with showers and longer spells of rain. Highest temperatures generally ranging between 16 to 20 degrees."
