Highest temperature in Shanghai on July 3?

Platform comparison

Market context

On 3 July 2026, the Shanghai Pudong International Airport Station will record its peak temperature for the day, a real-world event that determines the outcome of this prediction market. Current crowd-implied probability sits at 0% for the "YES" outcome, suggesting the market expects the temperature to fall outside the specified range, despite historical data indicating July is Shanghai’s hottest month with average highs of 87°F (30.6°C) and regular peaks exceeding 35°C (95°F) during sunny spells[3][5].

Historical patterns from recent summers show that temperatures in Pudong frequently breach 40°C, with Bloomberg Asia reporting a summer high of 40.4°C in parts of Pudong last year, the highest recorded that season[9]. This divergence between the 0% market probability and analyst consensus on extreme heat potential is notable when compared to sportsbook lines on similar weather contracts, which often price in higher odds for record-breaking temperatures. Traders should monitor daily weather bulletins from the Shanghai Meteorological Bureau and Wunderground updates for the station, as thundery showers forecast for Hongqiao may influence regional heat dynamics, though Pudong remains more exposed to direct solar heating[2]. Recent forecasts for June 2026 already showed daily highs ranging from 85°F to 91°F, reinforcing the likelihood of extreme temperatures in early July[4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shanghai on July 3? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.