Highest temperature in Shanghai on August 3?

Platform comparison

Market context

Shanghai’s afternoon heat is the real event here, because the market settles on the **highest temperature** logged at Pudong Airport on 3 August, not the day’s average. The crowd is pricing **0% YES**, so the favourite is effectively the market outcome staying below the implied threshold, while any meaningful daytime spike is the contrarian angle. Seasonal guidance for Shanghai in August points to very warm conditions, with forecast highs commonly in the low-to-mid 30s °C and monsoon humidity still in play.[1][6][12]

The historical read is that Shanghai in early August is usually hot enough to make upper-30s readings plausible, but not routine. Recent city forecasts have shown Shanghai around **29–37°C** and weather services for 3 August 2026 have already pointed to highs around **34.5–35°C** with showers or thunderstorm risk.[7][8][2] That makes the market’s 0% YES look like an overstatement if the relevant bucket includes a broad hot-weather range, but it remains aligned with an underdog view if the settlement bands are set unusually high. The value question is whether the consensus is underpricing a standard summer heat print rather than a true extreme.

What matters from here is the daytime evolution at Pudong: cloud cover, convective showers, and any thunderstorm timing can cap the high even in a muggy airmass.[2][10] For traders, the key dependency is not a policy announcement or scheduled release but the local weather sequence through the morning into early afternoon, when the station maximum is typically set. If radar and forecasts hold the rain-thunder setup, the underdog case strengthens; if sunshine breaks through, the market’s 0% YES implies there may be value in the hotter temperature bands rather than the cooler consensus.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on August 3? 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 Who Will Win, which mirrors the Polymarket order book at 0% fees.

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

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.

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.

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.