Met Éireann has issued a yellow warning for snow and ice for Cavan.
The forecaster says wintry showers could lead to localised accumulations of hail and snow in some areas.
It says these could compact to ice in some parts and lead to hazardous driving conditions.
The status yellow warning covers Cavan, Leitrim, Donegal, Mayo, Roscommon and Sligo and comes into effect at midnight tonight.
It expires at midnight tomorrow.