Overview
- The city is forecast to close astronomical summer with mild conditions, with daytime highs generally between 18°C and 21°C and a mix of sun and cloud.
- Forecasters assign measurable rain chances for the weekend, with CityNews putting Saturday and Sunday shower probabilities around 40 to 60 percent.
- The autumnal equinox arrives Tuesday, Sept. 22 at 8:05 p.m. EDT, the precise astronomical moment that marks the start of fall.
- Models show a cooler, unsettled pattern next week with daytime highs in the mid-to-high teens and overnight lows near 10–13°C, and showers possible Wednesday and Thursday.
- The forecast means outdoor plans could be interrupted and wardrobes should shift toward layers, with outlets noting broader seasonal drivers such as a strong El Niño as background context.