Highest temperature in Shanghai on June 22?

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Market context

Shanghai Pudong International Airport’s daytime high on 22 June is likely to land in a warm, summer-normal range rather than an extreme outlier. June climatology at the airport shows average daily highs rising from about 77°F to 83°F across the month, with readings rarely below 69°F or above 92°F, which puts the market squarely in a band where small forecast shifts matter more than broad seasonal direction.[1][4] For a trader using programme rules or conditional orders, the relevant input is not the citywide headline but the airport station’s recorded maximum on the day, so models should key off the specific Wunderground history page and the final UTC cut-off rather than broader Shanghai forecasts.[1]

The current 0% implied probability for a YES outcome is difficult to read as a true zero in weather terms; it usually reflects thin liquidity or a market still waiting for stronger signal from live forecasts. A comparable setup from the NWS time-series page shows the airport’s high temperature climbing through the day into the mid-80s°F band, which is consistent with a typical late-June Shanghai pattern rather than a dramatic spike.[2] BBC’s Shanghai airport page also shows warm, humid conditions with thundery showers and temperatures around 28°C, underlining that the main uncertainty is often convective rain versus sunshine timing, not whether it will be summer-warm.[3]

What matters over the remaining session is the evolution of forecast highs, thunderstorm timing and any rain bands that suppress daytime heating. AccuWeather’s outlook for the airport has an afternoon thunderstorm or two, with heavy rain later, which would tend to cap the maximum if it verifies early enough.[6] A practical workflow for power users is to monitor API or scraped forecast updates, compare model highs against the market’s settlement bins, and use alerts around the morning-to-afternoon forecast revisions, since those are the most likely to move the recorded peak temperature at the station.[2][6]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket App UK, 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?

On Polymarket App UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket App UK triggers a quick verification flow that finishes in 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.