Highest temperature in Shanghai on July 14?

Platform comparison

Market context

Shanghai's summer heat peaks in mid-July, with daily highs typically ranging between 32–36°C at Pudong International Airport. The settlement mechanism relies on Wunderground's historical weather database, which records the single highest temperature observation across all hours on 14 July 2026. This creates a straightforward data-point resolution: the market will settle to whichever temperature band contains that peak reading, with no ambiguity around measurement methodology or station selection.

Historical July temperatures at Shanghai Pudong show consistent clustering. Over the past decade, mid-July highs have exceeded 35°C in roughly 70% of years, with extremes reaching 37–38°C during heat waves. The 0% crowd probability suggests traders are either awaiting clearer seasonal forecasts or treating this as a calibration test rather than a genuine uncertainty. For programmatic traders, the key is that Wunderground updates historical data in near-real-time; conditional orders triggered on temperature thresholds would need to account for a 2–4 hour lag between observation and platform publication.

Catalysts remain limited until late June 2026, when extended-range weather models become actionable. China's meteorological authority typically issues July heat outlooks by mid-June, and any official warnings of above-average temperatures would shift market probabilities upward. Traders building automated systems should monitor both Wunderground's API availability and any scheduled maintenance windows on the Shanghai Pudong station itself, as sensor downtime or relocation would force manual resolution or market cancellation.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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.

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.

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.