Highest temperature in Shanghai on July 23?

Platform comparison

Market context

Shanghai’s peak temperature is measured at Pudong International Airport, and this market will settle on the day’s *single highest reading* there rather than a citywide forecast average. In practice, that means traders need to model the afternoon maximum at the airport station and map it to the market’s temperature bands, because the outcome depends on one observation, not the whole day’s weather pattern.

The current 0% implied probability on YES is a useful comparison point rather than a literal forecast signal; the wider market is already leaning towards the upper 30s Celsius, with 36°C priced as the front-runner and 35°C close behind.[1] July climatology in Shanghai is hot, humid, and often in the low 30s Celsius on an average day, so a reading in the mid-30s is not unusual enough to dismiss in an automated workflow that tracks heat indices, forecast highs, and intra-day model updates.[2]

For a programmatic trading setup, the main inputs are the airport-specific hourly forecast, convective cloud cover, and any shift in the daily maximum around early afternoon UTC, when Shanghai is well into its local daytime heating cycle. The key dependency is the Wunderground station page itself, because settlement uses the highest temperature recorded for all times on 23 July 2026 at Shanghai Pudong International Airport Station, so bots should watch for late-afternoon spikes and not just the first forecast update.

Sources: 1 · 2

Methodology

This page reviews Highest temperature in Shanghai on July 23? 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 Bot 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 Polymarket Bot UK. 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.

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.