There's a chance of snow in parts of Leinster and Munster later this week.
Met Eireann says there's a very cold week in store, and that temperatures on Wednesday won't get above freezing.
Meteorologist Paul Downes says today's wintry showers may worsen as the week goes on.
"There'll be rain and sleet today and some hail showers today."
Temperature forecast for the next 24 hours.
National forecast and outlook here : https://t.co/9gKN6SVok4 pic.twitter.com/km2ZD8kgZD
— Met Éireann (@MetEireann) January 4, 2021
"Tomorrow they may turn into snow especially if they drift inland into Leinster and parts of Munster or on higher ground."
"The west might see more sleet but more will come of that in the next couple of days."
Minimum air temperatures overnight at our 25 synoptic weather stations ranged from -4.2°C at Gurteen to 5.4°C at Malin Head. View today's full weather reports from our synoptic weather stations on our Current Observations page https://t.co/MvCx72KIaT pic.twitter.com/jjfTp8G3zn
— Met Éireann (@MetEireann) January 4, 2021
Mr Downes forecasts Wednesday will be a "bitterly cold day".
"Temperatures probably won't get above freezing in some areas."
"There'll be another band of snow on Wednesday night and into Thursday as well with possible accumulations."