Motorists in the midlands are being warned to drive with extra caution as snow has impacted on driving conditions around Co Laois.
People are also being urged to take care as strong winds and wintry showers are expected to sweep across the country.
Road conditions on the M8 motorway are dangerous due to ice and slush.
Motorists are advised to take care between Fethard and Cahir on the M8 in Co Tipperary.
Extreme care is advised on the N20 Cork-Limerick Rd between Rathduff and Mallow in Co Cork because of snow.
Icy conditions have been reported around Kilkenny, particularly on the road between Ballyragget and the city.
Met Éireann has issued a Status Yellow snow and ice warning with widespread thundery showers during today and tomorrow, with hail, sleet and snow forecast.
The warning will be in place until 8pm tomorrow and there are warnings that there may be accumulations of ice on untreated roads.
A spokesperson for Laois County Council said roads have been salted and gritted.
Conditions are poor on the N80 Portlaoise to Carlow road, at the Windy Gap outside Stradbally in Co Laois.
Gardaí have also advised motorists to avoid the Sally Gap and Glendalough in Co Wicklow.
A Status Yellow wind warning has also been issued for Donegal, Galway, Mayo, Clare, Cork, Kerry and Limerick and remains in place until midnight tomorrow.
Gusts of up to 110km/h may occur in places as west to south winds veer west to northwest.
The Road Safety Authority has said road users should be aware of black ice and also of falling debris during strong winds.
Cold and increasingly windy today, with frequent showers, some of them heavy and prolonged, with hail and local thunder. Some of the showers turning to sleet and snow especially later this afternoon and evening. Afternoon highs of just 3 to 5 degrees.— Met Éireann (@MetEireann) December 13, 2017