Jamima Eolanda

Summer 2024 Weather Predictions Ontario. Although the dog days of summer are still in full swing, winter weather will be here before you know it. While spring has just begun in southern ontario, some forecasters are looking ahead to summer.

Summer will be warmer and wetter than normal, with the hottest periods in early and late july. Fall officially begins on sunday, september 22, but when will it start to cool off?