Highest temperature in Shanghai on August 14?

Platform comparison

Market context

Shanghai's highest temperature on 14 August 2026 will be measured at Pudong International Airport Station and recorded in Weather Underground's Daily Observations table. The market currently prices this contract at 0% YES on Polygon, with settlement conditional on the specific temperature range that captures the day's peak reading in degrees Celsius. Traders are effectively shorting any outcome, reflecting either extreme confidence in a particular temperature band or sparse liquidity across the full range of possible outcomes.

August in Shanghai typically sees daily highs between 32–35°C, though extreme heat events pushing above 37°C occur roughly once per decade during summer months. Historical data from the past five years shows that mid-August temperatures have remained relatively stable, with 2023 recording a peak of 34.2°C and 2022 reaching 35.8°C on comparable dates. The 0% pricing suggests the crowd has already settled on a specific temperature range as most probable, leaving other brackets severely undervalued if Shanghai experiences an atypical heat spike or cooler-than-average conditions.

Traders should monitor China's meteorological forecasts released in early August 2026, particularly any alerts from the China Meteorological Administration regarding heat waves or typhoon activity in the Yangtze River Delta region. Tropical systems approaching from the Pacific can significantly suppress temperatures, whilst high-pressure systems anchored over central China drive sustained heat. Real-time weather model updates from major forecasting services typically become reliable 7–10 days before the settlement date, providing a critical window for reassessing the current market pricing against emerging atmospheric patterns.

Methodology

We track Highest temperature in Shanghai on August 14? 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.

UK Frequently Asked Questions

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 Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.