Highest temperature in Shanghai on August 3?

Platform comparison

Market context

Shanghai’s temperature at Pudong airport on 3 August will be decided by the day’s single highest observed reading, so the useful question is not the overnight low or the city average, but whether the afternoon peak clears each quoted band before the cut-off. For programme-style monitoring, the cleanest workflow is to poll the Wunderground station page through the day, compare the live maximum against adjacent market bands, and only act once the station has moved into a new bracket rather than reacting to every hourly fluctuation.

The current 0% YES pricing sits well below the broader August climate norm. Forecast providers expect Shanghai to sit in the low 30s Celsius in August, with AccuWeather putting daily highs across the month at about 82°F to 92°F, while other August guides cluster around 30–33°C and note persistent heat and humidity.[1][5][11][17] Comparable recent forecasts also point to highs in the mid-30s Celsius for early August, including 34.5°C to 35°C on 3 August in some models, which is consistent with a market that can still resolve into an upper temperature bucket if skies stay mostly clear.[2][4][9]

The main catalysts are the day’s official weather guidance, any late changes in cloud cover, rain or thunderstorms, and the local wind field, because these can cap the airport’s peak temperature even in a hot month. One recent municipal-style forecast for Shanghai showed cloudy conditions with a 29–37°C range, underlining that the upper end is still materially above the month average but not guaranteed.[7] For a trader running alerts or conditional orders, the key dependency is whether the station’s observed maximum forms early or only after midday heating; if showers or thunderstorms build, the realised high can stay a bracket lower than modelled, while a dry, sunny run can push the result towards the top end of the summer range.[2][18]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Review UK, which mirrors the Polymarket order book directly.

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 Polymarket Review 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.