Mostly cloudy at first today, with outbreaks of rain and drizzle, but brightening up gradually and becoming mainly dry, with sunny spells developing.
A few scattered showers will occur, mainly along western and northern coasts.
Cloud will thicken from the southwest later and outbreaks of rain will extend across Munster later this afternoon and this evening.
Cold, with maximum temperatures of 5 to 7 Celsius generally, but 8 or 9 degrees near the south coast.
Winds mostly moderate northwesterly, but strong for a time along north Connacht and Ulster coasts, later decreasing light southwesterly or variable everywhere.
Tonight, rain will extend from the west and southwest, with some heavy falls, turning to sleet and snow across Connacht, the northern half of Leinster and Ulster, with some accumulations for a time and hazardous driving conditions.
However, any snow will turn to rain later in the night and in the early morning as temperatures rise.
Minimum values 0 to 4 Celsius, coldest in the northern half of the country.
Winds mostly moderate to fresh southeasterly, (strong near coasts), later veering southwesterly and increasing strong to gale force in western and southern coastal areas.
Status Yellow - Rainfall warning for Connacht, Cavan, Monaghan, Donegal, Longford, Louth, Offaly, Westmeath, Meath, Clare and Tipperary
Rain on Sunday night into Monday morning will lead to accumulations of between 20 to 25mm quite widely, with higher totals possible in upland areas.
The rain is likely to be preceded by a period of snow in parts of Connacht, Ulster and north Leinster, before turning to rain later in the night.
As the ground is saturated at the moment and river levels are elevated the combined effect of rainfall and snow melt may lead to some localised surface and river flooding.
Warning valid from 8pm tonight until 8am tomorrow morning.