Highest temperature in Toronto on July 9?

Platform comparison

Market context

The real-world event at hand is the highest temperature recorded on 9 July 2026 at Toronto Pearson International Airport, measured in degrees Celsius. Current crowd-implied probability for a specific outcome sits at 0%, reflecting how the market spreads odds across eleven distinct temperature brackets. Historical data shows Toronto’s average July high hovers around 26°C (79°F), with daily highs rarely dipping below 21°C or exceeding 32°C [3]. Even during the recent Canada heatwave in early July that grounded 356 flights and caused 83 cancellations across major cities, peak temperatures in Toronto remained within the typical mid-to-upper 20s range [6]. This context suggests that assigning 0% to any single bracket is a structural feature of multi-outcome markets, not a directional signal that a specific temperature is impossible.

Traders should monitor Environment and Climate Change Canada’s operational forecast updates, particularly those released on the evening of 8 July, as these often drive sharp repricing in temperature contracts [1]. While no new extreme heat announcement has emerged since the early-July event, the proximity of 9 July to the month’s warmest average day (18 July, 26.4°C) means minor atmospheric shifts could push temperatures toward the upper end of the historical range [10]. Cross-platform comparisons show sportsbooks and prediction markets like Lines.com assign roughly one-in-three odds to the 26°C bracket for nearby dates, indicating that 0% implied probability on this specific contract likely reflects bracket dispersion rather than analyst consensus on impossibility [1]. Watch for any sudden changes in wind patterns or cloud cover reported by the National Weather Service at CYYZ, as these dependencies directly influence daily highs [8].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.