It will be bright in most areas today, with scattered showers expected, most of which will descend upon the north and north-west, according to Met Éireann.
Some heavy falls with a risk of spot flooding, especially in parts of Munster.
Tonight - Rain will turn to sleet and snow in parts of north Connacht, Ulster and North Leinster, with temperatures falling close to freezing in these regions, while it will be 2 to 6 degrees elsewhere.
Saturday – Heavy rain in places with sleet and snow expected in northern and north-western areas, followed by scattered showers.
Some showers will turn wintry, especially in the north and west and in other parts too, with hail, sleet and a risk of snow, Met Éireann has warned.
It will be dry on Saturday night, with further wintry showers forecast, mainly in west Ulster, Connacht and West Munster.
Temperatures will drop between -2 to plus 2 Celsius in the night; it will be very cold with widespread frost and a risk of icy stretches.
Sunday – St Patrick’s Day will be cold, with some sunny spells and scattered showers; temperatures will range from 7 to 10 Celsius in the day, while it will drop to -1 to 4 Celsius on Sunday night.