Highest temperature in Shanghai on August 4?

Platform comparison

Market context

Shanghai’s daytime high at Pudong airport on 4 August will settle on the single warmest reading recorded that day, so the practical question is whether the station prints a modest mid-30s Celsius day or an outlier closer to the upper end of Shanghai’s August range. AccuWeather’s August outlook for Shanghai shows daily highs broadly between 82°F and 92°F, while other August guides put the city’s typical highs around 31–32°C, with the possibility of much hotter peaks during sustained summer heat.[1][4][8]

For market framing, that makes a 0% YES price difficult to reconcile with the climate backdrop unless traders believe the airport station will miss the warmth seen in citywide forecasts or be capped by cloud, rain, or onshore flow. Comparable August forecasts for Shanghai repeatedly cluster around low- to mid-30s Celsius, with some sources explicitly showing 4 August around 34°C or 33°C, which is already inside the settlement bands many temperature markets would map to if the day runs near forecast.[2][3][12][15] A programmatic approach would treat the Wunderground station page as the authoritative feed, poll the daily history entry close to and after the settlement window, and update odds only once the day’s maximum is fixed.

The main catalysts are the intraday weather drivers that can change the maximum before 12:00 UTC: convective showers, typhoon-related cloud bands, wind shifts, and timing of peak sunshine. Shanghai’s August climatology is humid and rain-prone, with several forecast products already signalling either patchy rain or very hot conditions, so the key dependency is whether precipitation or maritime air suppresses the afternoon high below the consensus band.[4][7][8][13] For automated trading, the useful inputs are the latest airport-specific forecast, radar or rainfall alerts, and any storm-track updates affecting eastern China, then a final reconciliation against the station’s recorded high on Wunderground once the settlement window closes.[18]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Bot UK, which mirrors the Polymarket order book directly.

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.

FAQ

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.

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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 Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.