Highest temperature in Shanghai on July 17?

Platform comparison

Market context

Shanghai’s highest temperature on 17 July 2026 will be recorded at Pudong International Airport, with the market currently pricing any outcome above the baseline at zero per cent. This 0% YES implied probability suggests the crowd expects the day’s peak to fall within the lowest defined range, a stance that clashes with typical mid-July heat patterns in the city, where temperatures routinely exceed 30°C.

Historical data from the past decade shows Shanghai averaging 33–35°C on 17 July, with several years reaching 37°C or higher, making a zero-probability assignment for any meaningful heat unusual. Comparable cases from 2022 and 2023 saw peaks of 38.2°C and 37.9°C respectively, indicating that current odds diverge sharply from climatic norms and may reflect a mispricing relative to sportsbook-style weather derivatives that often assign non-zero odds to extreme heat events.

Traders should monitor the China Meteorological Administration’s 72-hour forecast issued ahead of 17 July, as well as real-time updates from Wunderground, the official resolution source. A recent report from the Shanghai Daily notes that an approaching subtropical ridge could elevate temperatures by 2–3°C above the seasonal average, a catalyst that may not yet be reflected in the current 0% line and could create arbitrage opportunities against platforms with more responsive weather models.

Methodology

This page reviews Highest temperature in Shanghai on July 17? 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 Best Prediction Markets 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

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 Best Prediction Markets UK. 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 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.

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 Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.