Highest temperature in Shanghai on August 6?

Platform comparison

Market context

Shanghai’s weather on 6 August will determine where the airport station’s daily high lands, and the contract is currently pricing that outcome as a complete miss, with the crowd at **0% YES**. That sits awkwardly against the live forecast picture: several commercial weather services point to a hot day, with highs around **33–36°C** in Shanghai and some shower risk, including Time and Date’s **95°F/83°F** outlook for the city and the Met Office’s hourly model reaching **36°C** later in the day.[2][13][19] For a temperature market settled from Shanghai Pudong International Airport Station, the key point is that the city forecast is only a proxy; the airport can run a little cooler or warmer depending on sea breeze, cloud cover and timing of any convection.[1][8]

Historically, August is Shanghai’s hottest and stickiest month, so a high in the low-to-mid 30s Celsius is the normal frame of reference rather than an outlier.[1][15][18] That makes the current zero-per-cent market price look much more like a thin, possibly stale screen than a strong statistical call. Cross-platform comparison matters here: the weather desks are broadly aligned on a hot day, while the prediction market implies an extreme downside scenario, and sportsbook-style weather lines, where available, usually cluster around the forecast high rather than discounting a materially cooler airport reading. The most relevant recent indicator is the near-term forecast set, not the monthly average, because the settlement depends on the single highest reading recorded during the day at Pudong, not the day’s mean.[1][2][13]

Traders should watch for any update to the hourly temperature track, thunderstorm timing and cloud cover, because those are the main drivers of whether the airport touches the upper end of the forecast range or settles a notch lower.[2][19] In Shanghai, late-morning and afternoon heating is often decisive, but passing showers can trim the peak if they arrive early enough.[2][13] The other dependency is source-specific: this market resolves from Wunderground’s Shanghai Pudong International Airport Station history page, so the final number is whatever that station logs for the day, even if citywide services show a slightly different high.[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

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

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 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.

What are the best prediction markets for UK traders in 2026?

For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.