Highest temperature in Shanghai on July 7?

Platform comparison

Market context

The real-world event at the heart of this market is the highest temperature recorded on 7 July 2026 at Shanghai Pudong International Airport, measured in degrees Celsius. In prediction markets, a YES share pays out if the temperature falls within the specified range, while a NO share pays out if it does not. The current crowd-implied probability of 0% for YES suggests traders believe the temperature will not hit the target range, yet historical data shows July is Shanghai’s hottest month, with average highs around 33°C and frequent peaks exceeding 35°C during sunny spells[3][5]. Current forecasts for today already indicate a maximum of 33°C, aligning with seasonal norms rather than anomalies[1].

Traders should monitor real-time weather updates from Wunderground, the official resolution source, and watch for sudden shifts in cloud cover, wind direction, or afternoon heatwaves that could push temperatures higher[1]. AccuWeather’s 10-day forecast predicts today’s high at 95°F (35°C), with a potential thunderstorm on 8 July that might cool subsequent days[7]. While no official government announcements are expected, the timing of settlement—ending 12:00 UTC on 7 July—means afternoon temperature spikes are critical. Given the 0% probability, the market may be underestimating typical July volatility, especially if clear skies persist through midday[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews 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 Prediction Market UK, 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 Prediction Market UK. 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.

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.