Highest temperature in Shanghai on July 24?

Platform comparison

Market context

Shanghai’s highest temperature on 24 July will be set by the reading at Pudong airport, so the market is really pricing a single-afternoon weather print rather than the citywide feel. That matters because airport observations can diverge from downtown conditions when sea breeze, cloud cover, or scattered showers build late in the day. On the current book, Polymarket shows a fragmented distribution with **36°C** leading at **26%** and **32°C** next at **19%**, while the crowd-implied probability for a binary YES contract is still **0%**, leaving the contract priced far more sceptically than the outcome spread suggests.[2]

Historically, Shanghai in July is a hot, humid regime: typical daytime highs are around **31°C**, with July averages near **32°C** in some travel-climate guides, and rain is common enough to cap extreme heat on many days.[1][3] That context makes mid-30s readings plausible but not routine, especially at the airport where marine influence can trim peaks. In comparison terms, a zero-priced YES on a contract resolved from a single station is a stark outlier versus the broader seasonal expectation, and it implies either a thin market or strong reluctance to pay for tail heat above the listed range.[1][3]

Traders should watch the local forecast for Shanghai Pudong rather than generic Shanghai forecasts, because the settlement source is the airport station and the relevant window closes at **12:00 UTC**, which covers the warmest part of the local afternoon.[2] The main catalysts are cloud cover, convection, rainfall timing, and any marine-layer suppression; a late-morning showers forecast can compress the day’s high, while a clear, humid post-rain build-up can still push the maximum into the mid-30s. No clear sportsbook analogue is visible for this exact weather print, so the practical comparison is between the prediction market’s sparse distribution and the meteorological consensus that July in Shanghai usually clusters in the low 30s, with only intermittent upside into the mid-30s.[1][2][3]

Sources: 1 · 2 · 3 · 4

Methodology

We track Highest temperature in Shanghai on July 24? 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

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.

FAQ

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.

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.

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 Kalshi vs Polymarket 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.