**Market-implied odds for Toronto’s September 2 minimum temperature remain tightly clustered (roughly 44–50%), reflecting substantial forecast uncertainty in the overnight low just 48 hours out.** Current short-range guidance from sources like WeatherBug, globalmeteo, yr.no, and Environment Canada-aligned outlooks points to a warm, humid air mass with daytime highs near 26–30 °C (79–86 °F) and overnight lows most likely in the 20–23 °C (68–73 °F) range—well above the long-term September 2 climatological average low of ~16 °C. Widespread cloud cover, scattered showers, and thunderstorms expected through the period will limit radiational cooling, while elevated dew points (near 20–22 °C) and light variable winds further suppress temperature drops. Slight differences among model runs—particularly in the timing and extent of any overnight clearing or thunderstorm outflow—create the spread between the leading 23 °C and 25 °C+ outcomes versus cooler possibilities around 16–19 °C. The narrow probability bands underscore how sensitive the final minimum remains to small changes in boundary-layer moisture, cloud persistence, and mesoscale convective activity before resolution.