Pronóstico: Highest temperature in Shanghai on July 7?

Platform comparison

Market context

The highest temperature recorded at Shanghai Pudong International Airport on 7 July 2026 will determine the outcome of this prediction market contract. Historical data for early July at this station shows daily highs typically ranging between 30°C and 35°C (86°F to 95°F), rarely falling below 24°C or exceeding 38°C [1][4]. While extreme heatwaves have pushed temperatures to 40.9°C in 2017 and 40.4°C in parts of Pudong recently, such events are statistical outliers rather than the norm for this specific date [7][8]. The current crowd-implied probability of 0% for the "YES" outcome (likely indicating a temperature above a specific high threshold) suggests the market views an extreme record-breaker as highly improbable given the standard seasonal baseline.

Traders should monitor the Shanghai Meteorological Bureau’s daily heatwave forecasts and any official red-alert weather announcements issued for the Pudong district, as these directly signal impending temperature spikes [7]. The settlement depends entirely on the Wunderground dataset for the Pudong station, meaning any discrepancy between official bureau reports and the third-party sensor feed could create resolution ambiguity. Recent news indicates that parts of Pudong have already exceeded 40°C this summer, a trend that traders must weigh against the historical average for early July [7]. On-chain mechanics on Polymarket, using USDC on the Polygon network with conditional tokens, will price these catalysts as the week progresses, with liquidity shifting rapidly if a red alert is issued before the 12:00 UTC settlement deadline.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Shanghai on July 7? 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 Argentina, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Argentina. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Argentina trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.