A number of schools were forced to close and some bus services were cancelled following freezing conditions overnight with more wet and windy weather set to sweep across the country.
Met Éireann has issued a weather advisory warning with gusts of up to 110km/h likely along southern and eastern coasts and there is also a risk of thundery downpours.
Snow is also forecast for west Ulster and north Connacht.
Motorists in Galway and Mayo were urged to drive with care following snow and a severe frost overnight.
Roads were said to be dangerous around Ballycroy and on approaches to Belmullet, while routes around Castlebar, Westport, Ballina, Crossmolina, Claremorris and Ballinrobe were all reported to be icy.
In Co Galway, there were particular problems around Cornamona and Clifden as a result of last night's freeze.
While there were no significant snow falls, parts of the N59 were reported to be slippy and there were some delays on that route, while secondary routes around Tuam, Loughrea and Gort were also difficult to negotiate.
AA Roadwatch said a number of vehicles had become stuck due to icy condition on Mountain Pass between Buncrana and Cardonagh in Co Donegal, while there was snow on some routes around Carrick-on-Shannon in Co Leitrim.
In Sligo, an articulated truck went off the road in the Ballymote area and the L1502 was closed and diversions in place.
Conditions were reported to be poor around Tralee and Killarney in Co Kerry, while routes in Co Cork were also said to be very slippy.
Bus Éireann cancelled a number of services in Cork and and the northeast due to the poor road conditions.
The following services in the northeast have been cancelled due to #sneachta— Bus Eireann (@Buseireann) February 12, 2018
07:30 from Ballyjamesduff to Oldcastle / Kells
08:45 from Kells to Bailiboro & return at 09:15
09:50 from Kell to Oldcastle
08:00 ex Cavan to Delvin & return
09:20 to Cavan@NorthernSoundFM
Gardaí in the midlands advised motorists to drive with care particularly on side roads following snow in some parts of the region.
Main roads were clear but many by-roads remained icy in areas of Roscommon, Granard and north Longford.
There were also reports of a lot of surface water on roads in Offaly and Laois.
Some school closures in Co Donegal
Snow and icy conditions in parts of Co Donegal led to a number of school closures as some school buses did not run this morning.
Donegal County Council gritted over 1,000km of roads, including all main routes from 6am, but some secondary and back roads were still in a dangerous condition this morning.
Across the northeast of the country several schools were closed due to the bad weather.
National schools and pre-school facilities were affected along with a number of day care facilities.