Highest temperature in Toronto on August 2?

Platform comparison

Market context

Toronto Pearson is the settlement point, so the key question is whether the airport tops out in the **mid-to-upper 20s Celsius** or pushes into a hotter, less common August spike. The market is pricing **0% YES**, which makes the current consensus strongly aligned with the cooler end of the range and leaves any warm-up as the contrarian angle rather than the favourite.

Historically, early August in Toronto is warm but not usually extreme: long-run August averages sit around **25°C** for daytime highs, and the 2 August climatology at Toronto shows an average high of about **26.7°C** with a recorded record high of **33.9°C** for that date[6][9]. That framing supports the underdog case for the higher temperature bands, but it also shows why the most likely landing zone is still a familiar summer heat range rather than a record-setting outlier. With the market at zero, the value sits where the distribution can still surprise: a brief heat ridge, strong sun and light winds can be enough to drag the airport maximum above consensus if the day evolves warmer than forecast.

The main catalysts are the local hourly forecast, any heat advisory or humidex signal, cloud cover, and whether a late-morning or early-afternoon breeze limits the peak at Pearson. One dated forecast source has Toronto on 2 August at about **27°C / 17°C** with sunshine, which is consistent with a modest upside case rather than a runaway heat event[5]. Traders should watch the updated airport forecast and any weather-service revisions through the morning, because the settlement uses the **day’s highest observed temperature**, not the overnight low or the afternoon average.

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 Who Will Win 2026, 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

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.

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 2026 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.