Highest temperature in Shanghai on August 13?

Platform comparison

Market context

On 13 August 2026, Shanghai will record a daily maximum temperature at Pudong International Airport Station. The market currently prices all temperature ranges at 0% on Polygon, meaning traders are not yet committing USDC to conditional tokens representing any outcome band. This absence of liquidity reflects the market's youth; with settlement nearly two years away, price discovery remains dormant until closer to the event window.

Shanghai's August temperatures exhibit narrow historical variance. Data from the past decade shows daily highs clustering between 32–35°C during mid-August, with extremes rarely exceeding 37°C or falling below 30°C. The 2013 heat wave that pushed readings to 40.6°C remains an outlier; typical August conditions favour consistent high humidity and afternoon thunderstorms that moderate peak temperatures. This historical tightness explains why traders may hesitate to back outlier ranges—the underlying meteorology offers limited surprise.

Traders monitoring this contract should track China's seasonal weather patterns as summer 2026 approaches, particularly any signals from the China Meteorological Administration regarding El Niño or La Niña conditions, which influence East Asian summer heat intensity. Tropical cyclone activity in the Western Pacific during July and early August could suppress temperatures through cloud cover and precipitation. The resolution mechanism's reliance on Weather Underground's Daily Observations table—rather than the Day High & Low summary—introduces a technical dependency; traders should familiarise themselves with that platform's data collection methodology at Pudong station to avoid settlement disputes.

Methodology

This page reviews Highest temperature in Shanghai on August 13? 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 Scam?, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Polymarket Scam?. 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.

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%.