Highest temperature in Shanghai on August 7?

Platform comparison

Market context

Shanghai is still in a hot, humid spell, and the latest forecasts keep the city in the low-to-mid 30s Celsius for the day, with several services showing a peak around 33-35°C and some variation on cloud cover and shower risk. AccuWeather’s August outlook has Shanghai running with daily highs of 82-92°F, while Met Office and Yandex both point to a maximum near 34-37°C, which is comfortably warm enough to make a sub-30°C result unlikely unless cloud or rain arrives earlier than expected.[1][7][16]

That leaves the market’s 0% implied YES as a poor guide to the likely temperature band: on comparable August days, Shanghai’s highs are typically around 32-35°C, and even the broader monthly climatology keeps highs near 87-90°F. In practical terms, the most relevant comparison is whether the airport station can get above the mid-30s without sustained rain or a sharp shift in wind, because that is where the settlement bands are most likely to sit.[8][9][14]

For traders, the main catalysts are the intraday evolution of cloud, humidity, and any thunderstorm risk over Pudong, since these can cap the day’s maximum even when the broader forecast looks hot. The key dependency is the highest reading at Shanghai Pudong International Airport Station in Wunderground’s daily history page, so late-morning and early-afternoon updates matter most if the forecast trim or a convective burst changes the peak temperature before the 12:00 UTC settlement window closes.[19]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on August 7? 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 Prediction Today, 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.

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 Prediction Today. 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%.