Slippery and icy road conditions were forecast by Environment Canada in a special weather statement issued for Durham.
It said because of possible freezing rain on Wednesday night, there was a risk of light ice accretion up to a few millimeters.
It pointed out that surfaces such as highways, roads, walkways and parking lots may become icy and slippery.
“Rain may transition to a period of freezing rain Wednesday evening, especially over areas of higher terrain.
“Any freezing rain is expected to transition to periods of light snow by early Thursday morning.
“Periods of light snow will linger through Thursday, though any accumulations are expected to be minor,” said the statement.