Highest temperature in Shanghai on July 6?

Platform comparison

Market context

On 6 July 2026, the Shanghai Pudong International Airport Station will record its peak daily temperature in degrees Celsius, a figure that will determine the outcome of a prediction market where the crowd currently assigns zero per cent probability to a “YES” result. This stark divergence from the tight clustering seen on Polymarket—where 35°C holds 53% implied probability and 36°C holds 39.9%—suggests either a mispricing in the current venue or a fundamental misunderstanding of seasonal norms by its traders[2]. Global models and the China Meteorological Administration align with Polymarket’s consensus, forecasting highs in the low-to-mid 30s Celsius, which contradicts the 0% implied probability elsewhere[2].

Historically, July at Shanghai Pudong sees daily highs rising from 84°F to 88°F, rarely dipping below 75°F or exceeding 95°F, with summer peaks regularly surpassing 30°C and reaching 35°C under sunny conditions[1][6]. The July 4 resolution, which settled near seasonal norms with 32°C as the leading outcome, reinforces that early July temperatures in eastern China cluster predictably around these values[3]. A trader ignoring this pattern risks betting against a near-certainty, especially as recent reports note Pudong District temperatures exceeding 40°C in prior summers, though such extremes are not the seasonal average[8].

Key catalysts include real-time updates from Wunderground, the official resolution source, and ensemble forecasts from global models that track peak readings against seasonal baselines[2]. Traders should monitor the Shanghai Meteorological Administration’s daily bulletins and wind-speed trends, which are increasing from 11.3 to 12.4 mph during July, potentially moderating heat spikes[1]. Any sudden shift in cloud cover or precipitation, as hinted by BBC’s drizzle forecast for Hongqiao, could alter the day’s maximum, though current data points firmly toward the 32–36°C range[4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shanghai on July 6? 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

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

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 Best Prediction Markets 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.

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.