Highest temperature in Toronto on August 2?

Platform comparison

Market context

Polymarket is pricing this Toronto Pearson temperature range contract at **0% YES**, so the market is assigning no immediate weight to any one outcome and is effectively waiting for the day’s actual high to emerge. Settlement depends on the **highest temperature recorded at Toronto Pearson Intl Airport Station** on 2 August 2026, with the result taken from Wunderground and paid out in USDC via Polygon conditional tokens, so the key question is not the citywide forecast but the airport station’s peak reading.

The historical frame is straightforward: Toronto’s August climate usually sits in the mid-20s Celsius, with an average August high around **26°C** and typical lows in the high teens, while hotter spells are not rare. Recent August summaries show daily highs near **25–29°C** in many years, but longer-run records for Toronto include much higher extremes, with the city’s all-time August high reaching **38.9°C** and individual August days frequently topping **30°C**[1][2]. For a range market, that means the base rate favours a modest summer high rather than an exceptional heat event, while still leaving room for a mid- or upper-20s Celsius settlement if conditions warm up.

Traders should watch the local forecast evolution through the morning and early afternoon, since the market closes before the full weather day is complete and the final high can still be set later in the daylight hours. The main catalysts are any heat alerts, shifts in cloud cover or rainfall timing, and changes in wind direction affecting Pearson specifically; airport observations can differ from downtown Toronto enough to move a temperature-range market. The latest forecast for Toronto in August 2026 points to daytime highs roughly in the **69° to 82°F** band, which translates to a relatively contained outcome distribution unless a warm front strengthens or storms suppress the midday peak[18].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Toronto on August 2? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

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

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.