Pronóstico: Highest temperature in Shanghai on July 31?

Platform comparison

Market context

Polymarket is pricing the Shanghai Pudong International Airport Station high-temperature contract at **0% YES** right now, so the market is saying there is effectively no cost on a hotter outcome in the tracked range. The event itself is straightforward: the exchange settles on the day’s *highest* recorded temperature at that airport station, in Celsius, with the result read from Wunderground’s daily history page and the market closed once the settlement window ends. On the on-chain side, this is a standard Polygon market funded in USDC and resolved through conditional tokens, so the main practical issue for holders is not the headline forecast but whether the observed airport maximum lands in the relevant bracket before resolution.

For context, Shanghai in late July is normally near its seasonal peak. Forecast and climate pages for the city put average July highs around the low 30s °C, with some current model runs showing highs in the mid-30s °C and occasional spikes toward the upper 30s °C.[1][4][10][14] That matters because a 0% price is not a statement that heat is impossible; it more often reflects thin liquidity, stale pricing, or a market that has already discounted the most likely temperature band. Comparable late-July Shanghai weather is typically hot, humid, and often unsettled, which can cap or amplify the final airport reading depending on cloud cover, rain, and wind on the day.[8][13][17]

The key catalysts are the same ones a spot-weather trader would watch: updated short-range forecasts, any shift in thunderstorm timing, and the airport station’s actual observations as the day progresses. Model guidance currently leans hot, with several services showing highs around 34–37°C and non-trivial rain chances, which can matter because showers or earlier cloud build-up can shave a degree or two off the daily maximum even in a very warm air mass.[11][13][14] Since settlement depends on the Shanghai Pudong Airport station specifically, traders should watch for divergence between citywide forecasts and the airport’s realised conditions, especially if sea-breeze effects or afternoon convection develop near the field.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Shanghai on July 31? 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 Polymarket Qué Es, 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.

FAQ

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 Polymarket Qué Es. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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