Highest temperature in Shanghai on July 22?

Platform comparison

Market context

Shanghai faces a critical heat check today as the settlement clock ticks toward 22 July 2026, with the market pricing in a near-zero chance of the temperature exceeding the implied threshold. On Polymarket, traders are locking USDC into conditional tokens on the Polygon network, betting that the Shanghai Pudong International Airport Station will not breach the specific Celsius range defined for resolution. The current crowd-implied probability sits at 0% YES, suggesting the on-chain consensus expects temperatures to remain within the lower bracket, despite the city’s notorious summer volatility.

Historical data from recent July periods in Shanghai shows maximum temperatures frequently reaching 38°C at Pudong Airport, as seen in current forecasts for the region [1]. However, the 0% probability implies the market believes this specific year’s peak will fall below the trigger point, perhaps due to anticipated cloud cover or wind patterns that typically suppress extreme highs. Comparable cases from previous summers indicate that while 38°C is a common ceiling, deviations occur when maritime influences intensify, a factor traders must weigh against the current pricing.

Traders should monitor the hourly updates from Wunderground, the designated resolution source, for any sudden spikes in temperature readings before the 12:00 UTC cutoff [1]. The primary catalyst is the real-time weather feed itself, as no external announcements or policy shifts will alter the physical outcome. With a 90% probability of precipitation noted in current local conditions, the likelihood of a record-breaking heatday diminishes, reinforcing the market’s bearish stance on the YES outcome [2].

Sources: 1 · 2

Methodology

We track Highest temperature in Shanghai on July 22? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 PolyGram. 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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.