A freezing rain warning issued by Environment Canada on Wednesday ended late Thursday morning.
School bus service for all English schools in Renfrew County was cancelled earlier in the morning but all other bus services in the Ottawa area were running normally.
Environment Canada issued a freezing rain warning Wednesday for Ottawa and much of eastern Ontario, from Deep River to Prescott-Russell and as far south as Smiths Falls and Perth.
By 5 a.m. Thursday, the weather agency said periods of freezing rain and freezing drizzle can be expected before temperatures rise above freezing later in the morning. At 6 a.m., the Ottawa airport was recording a temperature of -1 C with cloudy skies.
"Motorists should be prepared for hazardous winter driving conditions as untreated surfaces may become icy and slippery," the weather agency said in a warning posted on its website.
Thursday's high temperature is expected to hit 8 C.
By 11 a.m., when the temperature hit 1 C, the warning was lifted.