Highest temperature in Toronto on July 9?

Platform comparison

Market context

The real-world event at hand is the highest temperature recorded at Toronto Pearson International Airport on 9 July 2026, measured in degrees Celsius. The current crowd-implied probability for the market is 0% YES, suggesting the consensus firmly believes the temperature will not hit the specific bracket in question. This near-zero pricing is a stark contrarian angle when viewed against historical patterns, as it implies the market expects an outcome far outside the typical range for early July in Toronto.

Historical data frames this probability with caution. Average daily highs in July at Pearson hover around 26°C (79°F), rarely dipping below 21°C or exceeding 32°C, with the warmest day of the month typically occurring around 18 July[3][9]. While a recent heatwave in early July 2026 shattered records across Canada, grounding flights and causing delays[6], the 9 July date sits just after that peak. The market’s 0% stance may be undervaluing the lingering effect of that extreme weather, creating a potential value spot for those who believe the heat will persist slightly longer than the consensus expects.

Traders should monitor ongoing weather service updates for Pearson, specifically watching for sustained high-pressure systems or moisture influx that could elevate temperatures beyond the norm[7]. The recent news of the summer 2026 heatwave shattering records suggests that extreme conditions are still possible, even if the peak has passed[8]. Any announcement of a secondary heat spike or a delay in the cooling trend would be a critical catalyst, potentially shifting the probability from its current 0% baseline to a more realistic figure that reflects the volatile nature of this year’s summer weather.

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 Who Will Win, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

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

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.