The warning is not expected to be lifted until 10am tomorrow morning.
Kildare has been placed on a fog warning from 6pm this evening.
Other counties included are: Carlow, Kilkenny, Laois, Longford, Meath, Offaly, Westmeath, Cavan, Monaghan, Clare, Limerick, Tipperary, and all of Connacht.
The warning is not expected to be lifted until 10am tomorrow morning.