June 7 weather: Hot, humid and plenty of sun in southern Ontario

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Published June 6, 2026 at 3:52 pm

June 7 weather: Hot, humid and plenty of sun in southern Ontario

Things are warming up tomorrow in the GTA with nothing but sun and moderately high humidity.

According to Environment and Climate Change Canada (ECCC), tomorrow is shaping up to be bright and warm throughout the GTA, as in Toronto, daytime highs will soar to a perfect 26, ending with a nighttime low of 14 C, with some light breezes here and there throughout.

As for Mississauga and Brampton, temperatures will remain the same as in Toronto proper, right down to the Humidex reading 30 and the UV index sitting at 8, which means a lot of sun.

For Hamilton and Halton, things get even warmer with a daytime high of 27 C and nighttime lows of 13 C.

In Durham, things get a touch colder, with daytime highs of 22 C and nighttime lows of 13 C.

Down south in the Niagara region, things warm back up with daytime highs of 25 C and nighttime lows of 13 C.

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