Summer Predictions 2024 Ontario. It is shaping up to be a gross and sticky summer in ontario, according to a new forecast that predicts hot and humid conditions expected to engulf the region for much of the. Summer will be warmer than normal, with rainfall above normal in the east and below normal in the west.

While summer doesn’t officially kick off until june 20 in canada, southern ontario residents have already experienced hot weather. This week, it is expected to feel like 34 c in.