Ontario To Witness Muggy, Showery Tuesday Ahead Of Cool Down

One last bout of active and muggy weather will see southern Ontario into Tuesday as heavy rain, showers, and thunderstorms roll through parts of the province into Tuesday.

That’s ahead of clearer skies, but another dip in the temperatures for the latter half of the week.

The major highlights are:

– Overnight rain, thunderstorms into Tuesday for the southwest, Niagara.
– Muggy Tuesday for most, humidex low-to-mid 30s.
– Another shot of cooler air possible mid-week, but the heat will return towards the latter half of the month

The boundary bringing active weather to southern Ontario is finally on its way out of the region, but not before one more low-pressure centre skims past the Lower Great Lakes and spawns showers and thunderstorms into early Tuesday.

Showers and possibly a few rumbles of thunder are expected to persist into Tuesday morning through southwestern Ontario, along the northern shores of Lake Erie, and through the Niagara Peninsula as the low tracks south of the region. Skies will largely clear once the low drifts into New England Tuesday afternoon.

While this low is expected to remain south of the Lower Great Lakes, it would take only a slight northward shift to bring some of its heavier rainfall into southwestern Ontario. As it is, only the extreme southwest can expect to pick up much widespread rain through Tuesday.

Cooler, but close to seasonal, temperatures follow for the mid-to-late week across southern Ontario in the wake of the showery start to the week. This doesn’t mark the end of summer however, with rising heat and humidity expected as early as this weekend.

“This weekend will feature a warming trend as high temperatures on Saturday will be hovering near seasonal and then climb into the upper 20s for Sunday,” says Weather Network meteorologist Dr Doug Gillham.