Highest temperature in Toronto on May 24?

Platform comparison

Active sub-markets

Market context

On 24 May 2026, Toronto Pearson International Airport will record a daily high temperature, and this market settles on which Celsius range contains that figure. Polymarket currently prices all temperature bands at 0% YES, reflecting the standard state of unresolved future weather contracts weeks before the settlement window. The conditional token structure means traders are effectively purchasing claims on specific temperature outcomes, with USDC collateral locked on Polygon until Wunderground's historical data confirms the actual high.

May 24th in Toronto typically falls within late spring conditions. Historical averages for this date centre around 20–22°C, though the city has recorded highs as low as 12°C and as high as 29°C on this calendar day across recent decades. The 0% pricing across all bands reflects genuine uncertainty rather than consensus that no temperature will be recorded; rather, it signals that no single range has accumulated sufficient trader conviction to move away from baseline odds. Comparable spring-weather markets show similar flat distributions until meteorological forecasts narrow within 7–10 days of settlement.

Environment and Climate Change Canada issues extended forecasts roughly two weeks ahead, with meaningful refinement arriving five to seven days before 24 May. Traders should monitor late-May weather pattern announcements from ECCC and track whether high-pressure systems or frontal systems are positioned to influence southern Ontario during that window. The settlement mechanism depends entirely on Wunderground's historical archive for Toronto Pearson, making data availability the only operational risk once the day concludes.

Methodology

This page reviews Highest temperature in Toronto on May 24? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.