Temperatures will fall back below normal with daytime highs near -11°C.
The Weather Service issued a flood warning on Monday due to high water levels in creeks, rivers and streams.
Please continue to monitor alerts and forecasts issued by Environment Canada.
A wintry mix of precipitation will hit Thursday into Friday.
This snow is the result of a Colorado low that will track over Northeastern Ontario Monday evening.
People in Waterloo region, Wellington county and Guelph should be on the lookout for adverse weather conditions and take necessary safety precautions, the weather agency says.
There could be accumulations of 0.10 to 0.25 inches of ice Tuesday night. Travel is expected to be hazardous as a result.
While many of us will be tempted to stow away shovels and rock salt this week, the calendar reminds us it is still early February. So this is going to be more of an ice event vs snow. That will mean winds on the gusty side, along with more winter-like temperatures. Colder toward the weekend, with another snow chance by Sunday. You can keep an eye on school and business closures here.
Motorists will find it hard to see as heavy fog is expected to cover most of the region.