Highest temperature in Shanghai on July 23?

Platform comparison

Market context

Shanghai’s highest temperature for the day will be set by the Shanghai Pudong International Airport Station reading, with the market currently implying **0%** for a **YES** outcome against its quoted range structure. That leaves the consensus effectively pointing away from the top-end bands and towards a cooler-than-thought finish, so the favourite is the lower temperature ranges rather than a heat spike, while the contrarian value case is any late-session drift higher if the afternoon warms faster than expected.

The historical frame is that Shanghai in July is normally hot and humid, but not uniformly extreme, with rain still common enough to cap daytime highs on many days. One weather guide puts July’s average day in Shanghai at a 46% chance of rain, which matters because cloud cover, showers and onshore flow can keep airport readings pinned below the most aggressive forecast bands.[2] Against that backdrop, a 0% crowd price looks like a strong underdog signal rather than a balanced book: the market is effectively pricing a very specific upper outcome as implausible, so any evidence of sustained sunshine or weak rainfall cover would be the main value spot for a bullish contrarian.

For traders, the key catalysts are the observed morning temperature trend, the strength and timing of any convective rain, and whether the airport station sees a late-afternoon peak before the settlement window closes. In practical terms, the biggest dependency is the local diurnal cycle: if cloud and showers linger, the high can be suppressed; if skies clear earlier than expected, Shanghai can still run hot enough to invalidate the market’s low-probability stance. The relevant consensus anchor is the market itself, where 36°C is the current frontrunner at 40% and 35°C sits next at 35%, which suggests the crowd is clustered around a hot-but-not-extreme finish.[1]

Sources: 1 · 2

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 Who Will Win, which mirrors the Polymarket order book directly.

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 Who Will Win. 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 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.