Highest temperature in Shanghai on July 5?

Platform comparison

Market context

The real-world event hinges on the peak air temperature recorded at Shanghai Pudong International Airport on 5 July 2026, measured in degrees Celsius and resolved via Wunderground data. Historical patterns for early July show daily highs typically ranging between 30°C and 32°C, with rare excursions above 35°C; in 2025, the airport reached 38°C during a heat spike. Given that the current crowd-implied probability for a “YES” outcome sits at 0%, this likely reflects a market definition where “YES” corresponds to an extreme outlier (e.g., above 38°C), which is statistically improbable under normal subtropical conditions. Programmatic traders would model this using ensemble forecasts and historical variance, treating the 0% as a signal of low tail risk rather than a mispricing.

Traders monitoring this market should watch for sudden shifts in regional weather patterns, particularly the arrival of typhoons or intense convective systems that could elevate temperatures beyond typical ranges. Recent climate reports note that Shanghai’s July heat is increasingly influenced by urban warming and persistent high-pressure systems, which can trap heat and push temperatures higher. A key dependency is the timing of the peak heat, which usually occurs around 3 PM; any deviation in cloud cover or wind speed before then could alter the day’s maximum. While no specific announcement is imminent, traders should track real-time updates from the National Weather Service for ZSPD and Wunderground’s hourly logs, as these provide the definitive resolution data. The market’s low probability assignment is consistent with current ensemble guidance, which clusters expected highs near 30–32°C.

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Methodology

This page reviews Highest temperature in Shanghai on July 5? 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 Polymarket Review UK, 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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

Do I need to KYC for this market?

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