Highest temperature in Toronto on August 7?

Platform comparison

Market context

Toronto Pearson’s highest temperature on 7 August is being settled off the Weather Underground **Daily Observations** table, so the key question is the actual airport reading rather than the more prominent day-summary figure. Pre-market pricing at **0% YES** implies the crowd is effectively treating a qualifying high as very unlikely, which is consistent with a day that has already trended cooler than the upper-20s Celsius outcome needed for the widest affirmative bands. Weather Underground showed Toronto at **69°F** on the evening of 7 August, while the broader forecast sources pointed to highs around **25–28°C** for the day, leaving little evidence of an extreme upside surprise.[2][1][4]

The historical comparison for this kind of market is straightforward: Toronto in August usually sits near the mid-20s Celsius, with long-run daily highs around **25–26°C** and only occasional pushes into the high 20s or low 30s.[7][12][14] That makes a band anchored well above the seasonal norm dependent on a clear, sunny, low-wind afternoon rather than the more common humid-cloudy pattern. City forecasts on 7 August highlighted **cloudy skies, shower risk and high humidex**, which tends to cap the official airport maximum compared with inland or urban readings.[3][9]

The main catalyst for traders is the late-day evolution of the Pearson observation sequence, because the market resolves from the station’s recorded maximum in Celsius, not the headline daily high. The nearest watchpoints are whether showers or thunderstorm remnants clear early enough for a late-afternoon rise, and whether the airport station posts a single higher hourly observation before evening cooling sets in.[8][13] With the settlement window ending at **12:00 UTC**, any late updates to the Daily Observations table are the decisive inputs, especially if the day’s peak has already been set by early evening local time.[2][8]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Highest temperature in Toronto on August 7?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

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