It's been chilly since Friday, when a cold front blew into the province, bringing a swath of cool air and heavy downpours. The northwesterly winds from this system helped to drop temperatures below the seasonal mark.
Then on Saturday, most of the province was dealing with unsettled conditions, which included cool temperatures and scattered showers. North Bay barely made it to 15°C, while Toronto was hovering at a crisp 17°C. Meanwhile, Sault Ste. Marie saw 22 mm of rain soak the ground. “It's mainly due to the big upper low in place with a cooler air aloft and winds out of the northwest,” explains Michelle Cassar, a meteorologist with The Weather Network.
And if the cool and wet conditions weren't enough, the winds were raging across the province on Saturday as well. In Picton, gusts reached 81 km/h and in Toronto, the planes weren't flying high at the annual Canadian International Air Show because wind gusts were peaking at 70 km/hr, making the water too choppy for rescue boats. And in Orillia, there were widespread power outages because of the high winds.
“It's been so gusty because south of the Great Lakes, we're seeing an area of high pressure, which creates a pressure gradient,” says Cassar.
The cooler conditions continued to hover over the region for Sunday. Most of the province again saw scattered and isolated showers, although it was not as windy. Temperatures were stuck in the upper teens. However, conditions on Labour Day are a lot more promising.
“There's low pressure over Hudson Bay wrapping cold air into southern Ontario, but on Monday we get more into a southwesterly flow because of the high sitting over the southern U.S. This will push air from that region up here,” says Greg Stephens, a meteorologist here at The Weather Network. Temperatures are expected to rebound back to seasonal with plenty of sunshine, which is a great sendoff to the summer season.