Summer Predictions 2024 Ontario. As ontarians experience sweltering hot temperatures just ahead of the official summer. A “changeable” summer is forecasted for most of ontario, with periods of hot weather impacting northern parts of the province cooling off with frequent cold fronts.
Summer will be warmer and wetter than normal, with the hottest periods in early and late july. If you’re hoping for a lot of pool or beach time, you may be happy about this forecast.