Highest temperature in Shanghai on June 27?

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Market context

The underlying event is the highest temperature recorded at Shanghai Pudong International Airport on 27 June 2026, measured in degrees Celsius. Historical data shows June highs at this station typically range from 27°C to 30°C, rarely exceeding 32°C, with the plum rainy season often capping peaks through frequent cloud cover and humidity[1][6][7]. Given this consistent thermal ceiling, the current 0% crowd-implied probability for a higher range aligns with decades of comparable weather patterns where extreme heat above 35°C is virtually absent in Shanghai during this month[1][9].

Traders should monitor real-time meteorological updates and any sudden shifts in the plum rain front, as a break in cloud cover could temporarily elevate temperatures, though sustained extremes remain unlikely[2][7]. Recent flight advisories indicate potential weather-related delays at Shanghai airports on 27 June, suggesting active atmospheric conditions that may reinforce the typical humid, overcast profile rather than clear, scorching skies[5]. No major regulatory announcements are expected to alter settlement, but the market’s accessibility hinges on jurisdictional frameworks: German GlüStV rules may restrict participation for residents, while US CFTC reach applies to platforms offering unregistered derivatives, and the “no-KYC up to $1,500” threshold allows limited access for users avoiding identity verification, provided they comply with local laws.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 Legal 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.

What does it cost to trade on Polymarket Legal UK?

Zero. Polymarket Legal UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

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