Pronóstico: Highest temperature in Shanghai on August 5?

Platform comparison

Market context

Polymarket is currently pricing the Shanghai airport heat contract as if a **0% YES** outcome is the consensus, but the underlying weather still looks like classic early-August Shanghai: hot, humid and prone to small forecast errors that can shift the day’s maximum by a degree or two. The market settles against the **highest temperature recorded at Shanghai Pudong International Airport Station** in Celsius on 5 August, with outcomes resolved from the Wunderground history page, so traders on Polygon are really buying and selling conditional tokens tied to a single station reading rather than the citywide forecast.

That 0% print is much more aggressive than the surrounding climatology suggests. August normals for Shanghai sit around the low-30s Celsius, with typical daily highs near **31–32°C** and some forecasts for 5 August clustering in the **34–35°C** area.[3][4][5][10] Comparable daily forecast snapshots for Shanghai have repeatedly shown maxima in the **33–35°C** band, which means a one- or two-degree move from late-morning sun, cloud cover or shower timing can matter more than the broad seasonal backdrop.[2][9][17] In practice, the market is best read as a station-specific temperature call rather than a pure “will it be hot?” bet.

The main catalysts are weather-model updates, the timing of any showers or thunderstorms, and whether cloud cover suppresses the afternoon peak. Shanghai’s August pattern is often influenced by heat and humidity, with rainfall and typhoon-season disturbances introducing enough volatility to alter the exact daily high even when the month looks broadly warm.[3][7][15][18] Traders should watch the Pudong airport observation sequence through the settlement window, because the contract resolves from the *highest* reading published for the day, and revisions only matter until the first datapoint for the next date appears on Wunderground.[10]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Shanghai on August 5? 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.

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.

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.

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.