A Status Yellow low temperature/ice warning is in effect nationwide as Met Éireann warns of hazardous travel conditions and travel disruption.
The warning is in effect nationwide until 10am.
Met Éireann warned that temperatures are expected to fall to between -1 and -3C across the country, with sharp frost and icy conditions.
A Status Yellow rain warning will come into operation for Cork and Kerry from 12pm until 12am, with heavy rain leading to possible spot flooding and difficult travelling conditions.
A separate Status Yellow warning for rain and snow has been issued for Cavan, Donegal, all of Connacht and Longford.
The warning will also be in effect from 12am until 12pm.
The forecaster said rain, which will be heavy at times, will turn to sleet or snow in some areas, which, along with strengthening winds, will lead to poor visibility and difficult travel conditions.
Yesterday, several areas of north Dublin experienced significant levels of flooding after heavy rain.
