DONEGAL County Council will have its gritters dispatched from 6am tomorrow morning as the cold snap continues.
Met Eireann say that temperatures will drop to as low as -1 overnight with frost forming under any clear skies.
Sleet showers are also forecast on higher ground.
Primary routes in Donegal will be treated from early on Monday morning, the Council has said.
The following routes will be gritted from 6am:
01: National Primary North
02: National Primary Central
07: Milford South
09: Cill Ulta East
11: Na Rosa
12: Binswilly
13: Stranorlar North
14: Stranorlar East
15: Stranorlar West
17: Donegal North
18: Donegal South
LT: Letterkenny Town