June 28 weather: It will get up to 31c in southern Ontario

By

Published June 27, 2026 at 8:23 pm

sunny summer weather flowers

You wanted great Sunday weather? You got it.

As June winds down, southern Ontario is finally getting what many have been waiting for: a beautifully warm day filled with sunshine.

According to Environment Canada, the morning will start off a little foggy, but the mist should clear by the time most people are enjoying their second cup of coffee.

Temperatures will steadily climb through the day, peaking at around 3 p.m. with highs of 28 C in Toronto, Mississauga, Oshawa, Hamilton, Niagara, Pickering and surrounding areas. With the humidex, it will feel more like 31 C.

As the sun sets, temperatures will gradually fall, dropping to about 15 C overnight—ideal sleeping weather if you’d rather give the air conditioner a break.

The comfortable conditions won’t last long, however.

The week ahead is expected to turn hot and humid, with daytime highs climbing above 30 C and feeling even warmer with the humidex. The heat is expected to stick around through Canada Day and continue into next weekend.

INsauga's Editorial Standards and Policies

PollView All

Last 30 Days: 42,583 Votes
All Time: 1,404,142 Votes

WIN A $100 GIFT CARD

Subscribe to INsauga’s daily email newsletter for a chance to win a $100 Amazon gift card.