Highest temperature in Shanghai on May 26?

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Market context

Shanghai's maximum temperature on 26 May 2026 will be recorded at Pudong International Airport Station and resolved against historical weather data. The crowd currently assigns zero probability to any outcome, suggesting either extreme uncertainty about the settlement mechanism or insufficient liquidity to establish meaningful pricing across temperature bands.

Late May in Shanghai typically sits in the warm-to-hot range, with historical May averages around 28–30°C and occasional peaks above 32°C during early summer heat waves. The 0% implied probability across all ranges is unusual given that Shanghai reliably records measurable temperatures every day; this reflects a market structure issue rather than genuine forecasting consensus. Comparable late-May conditions from recent years show variability—2023 saw highs in the low 30s whilst cooler years dipped to mid-20s—making any single narrow band a genuine underdog play rather than a lock.

Traders should monitor seasonal weather pattern forecasts released in April and early May 2026, particularly whether the East Asian monsoon transition brings cooler maritime air or allows continental heat to dominate. The China Meteorological Administration publishes monthly outlooks that typically become more precise 10–14 days before the target date. Wunderground's historical data feed has proven reliable for Shanghai airport readings, though traders should verify the exact station designation (ZSPD) matches the settlement source before committing capital. The settlement window closes at noon UTC on 26 May, creating a hard deadline for final temperature confirmation.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win 2026, 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?

Who Will Win 2026 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'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.

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.