Highest temperature in Shanghai on July 9?

Platform comparison

Market context

The real-world event hinges on the peak temperature recorded at Shanghai Pudong International Airport on 9 July 2026, a date historically prone to intense summer heat. Current crowd-implied probability sits at 0% YES, suggesting the market believes the temperature will not reach the highest bracket in question. This consensus reflects a cautious reading of recent forecasts, yet it may overlook the volatility inherent in Shanghai’s mid-summer climate.

Historically, July in Shanghai delivers daily highs averaging 26–31°C, with peaks frequently reaching 38°C (100°F) in 2025, as noted by China Highlights [2]. WeatherSpark confirms that daily highs in July typically climb from 84°F to 88°F, rarely dipping below 75°F [1]. These comparable cases indicate that a 0% probability may be overly dismissive, especially given the region’s tendency for sudden heat spikes under broken cloud cover, as seen on 9 July in prior years [3].

Traders should monitor real-time updates from Wunderground, the official resolution source, and watch for any sudden shifts in cloud patterns or humidity levels that could trigger a heat surge. AccuWeather’s July 2026 forecast for Pudong shows highs ranging from 86° to 97°F, with overnight lows between 77° and 81°F [4], while Shanghai’s broader forecast suggests highs up to 98°F [7]. The value spot likely lies in contrarian positions against the 0% consensus, as the data supports a non-zero chance of extreme heat. No moralising is needed—just factual alignment with the weather patterns.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shanghai on July 9? 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Who Will Win. 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.

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.

Do I need to KYC for this market?

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