Summer 2024 Weather Predictions Ontario. With just four months to go until the official start of winter, ontario may want to enjoy the warm weather while it lasts, ahead of what might be a very unpleasant chilly. While spring has just begun in southern ontario, some forecasters are looking ahead to summer.

Summer will be warmer than normal, with rainfall above normal in the east and below normal in the west. It’s all in the 2024 edition of the farmers’ almanac!