Highest temperature in Shanghai on August 6?

Platform comparison

Market context

Polymarket currently prices this contract at **0% YES**, meaning the market is effectively assigning no chance that Shanghai Pudong International Airport’s highest temperature on 6 August 2026 lands in the specified outcome range. The contract settles in USDC on Polygon through conditional tokens, so the tradable price reflects where users think the Wunderground airport observation will finish once the day closes, not a citywide average or a headline forecast.

That 0% reading sits against a backdrop of persistent August heat in Shanghai. Seasonal references put early-August highs around the low 30s Celsius, with humidity and rain common, while today’s short-range forecasts for Shanghai show daytime temperatures well into the 30s °C and a high near 34–35°C, depending on source[1][2][3][4][8][18][20]. For a market tied to the *highest* airport reading, traders usually focus less on the daily maximum and more on whether the station logs a brief spike above model expectations before showers, cloud cover, or sea-breeze moderation cap the peak[2][18].

The immediate catalysts are the intraday forecast updates and whether convection clears sooner or later than expected around eastern Shanghai. Timeanddate’s forecast for Shanghai on 6 August points to passing showers and a high near 35°C, while AccuWeather shows a similar hot profile, which matters because the airport station can move a degree or two either side of the city forecast depending on cloud breaks and wind[2][18]. For Polymarket users, the practical watchlist is the station-specific Wunderground history page as observations accumulate, because settlement depends on the recorded airport maximum rather than a general Shanghai forecast or a meteorologist’s outlook[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shanghai on August 6? 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

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.

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%.