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Toronto Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  | | | | | | |  |  | |
| Mostly Clear | Sunny | Chance of T-Storm | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Sunny |
| Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 70°FLo: 21°C | Hi: 90°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 90°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 95°FHi: 35°C Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 637 PM CDT Thu Sep 03 2026 
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Issued: 627 PM CDT Thu Sep 3 2026
Key Messages
- An Extreme Heat Warning remains in effect areawide through Friday and for parts of the area Saturday with dangerous heat index values between 100 and 109 degrees.
- There is a very low chance (10-15%) for an isolated severe thunderstorm late this afternoon and evening and again Friday afternoon and evening. The primary threat will be damaging wind gusts. A marginal severe risk lingers over portions of east central Illinois Saturday.
Discussion
... Issued at 142 PM CDT Thu Sep 3 2026
Exces...