A weather alert has been issued for Mississauga, Brampton, and Niagara Region.
Environment Canada has issued a yellow frost advisory for the municipalities with chilly conditions expected overnight.
In Niagara, St. Catharines, Grimsby, Niagara Falls, and Welland are among the places impacted.
Environment Canada said patchy frost is expected, mainly for areas away from the lakes.
Forecasters are predicting a low of 1 C overnight in Mississauga, Brampton, St. Catharines, and Niagara Falls.
However, as mentioned it’ll be a bit warmer as you get closer to the lakes.

Areas shaded in yellow are under a frost advisory from Environment Canada with chilly conditions expected overnight. Frost is expected, particularly for areas away from the lakes. (Credit: Environment Canada)
Heading into the day on Wednesday, a high of 16 C and sunny conditions are expected.
Comfortable highs in the teens and dry conditions are expected to continue over the next several days as well.
In Mississauga and Brampton, a normal high for this time of year is 12 C with a low of 3 C, according to Environment Canada.
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St. Catharines and Niagara Falls normally see a high of 12 C as well, with a low of 5 C.

The forecast for Mississauga and Brampton over the next several days shows dry conditions and warm high temperatures in the teens are expected. However, lows will be chilly some nights, approaching the freezing mark. (Credit: Environment Canada)
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