Highest temperature in Toronto on June 25?

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Market context

The real-world event hinges on the highest temperature recorded at Toronto Pearson International Airport on 25 June 2026, measured in degrees Celsius. Current crowd-implied probability sits at 0% for a "YES" outcome, suggesting traders expect the temperature to fall outside the specific range being bet on, likely due to prevailing cooler conditions or a mismatch in the defined bracket.

Historical data frames this low probability with context: June 25 has rarely seen extreme heat at Pearson, though 22.9°C marked the highest low temperature for that date since 1938, indicating a trend of mild mornings rather than scorching peaks [9]. While a record-breaking 35.8°C was recorded at Pearson during an extreme heat event in a prior year, such spikes are anomalies rather than seasonal norms, and current forecasts for 25 June 2026 show highs near 21–25°C with thundery showers, far below the thresholds that would trigger a "YES" in a high-range market [1][2].

Traders should monitor Environment Canada’s daily heat advisories and the Wunderground hourly feed for the Pearson station, as sudden shifts in cloud cover or precipitation could alter the peak temperature before the settlement window closes at 12:00 UTC [3]. Recent forecasts for June 2026 at Pearson indicate daily highs between 68°F and 83°F (20–28°C), but today’s specific outlook includes risk of thunderstorms and a high of 25°C, which may cap the day’s maximum well below any high-range threshold [7]. The market’s book depth remains tied to funding flows from payment rails like Klarna and SEPA, where deposit friction and withdrawal fees influence trader participation and liquidity on such weather-dependent contracts.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Toronto on June 25? 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 Polymarket Klarna UK — the application we operate, where you trade directly against 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?

On Polymarket Klarna UK, 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?

Polymarket Klarna UK 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 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?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Klarna UK triggers a quick verification flow that finishes in minutes.

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.