{"id":940750,"date":"2026-10-21T02:08:15","date_gmt":"2026-10-21T02:08:15","guid":{"rendered":"https:\/\/www.newsbeep.com\/ca\/940750\/"},"modified":"2026-10-21T02:08:15","modified_gmt":"2026-10-21T02:08:15","slug":"oct-21-weather-sunny-and-high-near-15-c-in-southern-ontario","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/ca\/940750\/","title":{"rendered":"Oct. 21 weather: Sunny and high near 15 C in southern Ontario"},"content":{"rendered":"

Wednesday\u2019s weather forecast calls for mostly sunny skies in the Greater Toronto Area and across southern Ontario.<\/p>\n

Environment and Climate Change Canada says the morning will be sunny in Toronto, Hamilton, Oshawa, Pickering and the Niagara Falls area.<\/p>\n

Conditions will be mainly sunny with some cloud cover expected in Mississauga, Brampton, Burlington and Oakville.<\/p>\n

The daytime high is expected to be 15 C in Toronto and 16 C in Mississauga. Temperatures could reach up to 18 C in Sarnia and Windsor. The seasonal normal for Oct. 21 in Mississauga is between 3 C and 12 C, Environment Canada says. The UV index will be 4 or \u201cmoderate\u201d across the GTA.<\/p>\n

Conditions are expected to clear across the GTA and most southern Ontario on Wednesday evening, and the low will be around 5 C, the weather agency says.<\/p>\n

Warmer-than-usual temperatures are expected to stick around through most of the week, according to Environment Canada.<\/p>\n

<\/p>\n

<\/p>\n

Thursday\u2019s forecast calls for more sunny skies with a high of 18 C and a low of 1 C overnight, while Friday will cool slightly\u00a0with a high of 13 C expected.<\/p>\n

Looking ahead to the weekend, conditions are expected to be sunny on Saturday with a high of 16 C and a low of\u00a0 5 C. Sunday could bring a mix of sun and cloudy conditions to Mississauga with a high of 18 C and a low of 7 C.<\/p>\n

Next week could bring showers to the GTA. Conditions are expected to be a mix of sun and cloud on Monday in Mississauga, with a 30 per cent chance of showers and a high of 15 C.<\/p>\n

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