Highest temperature in Shanghai on August 4?

Platform comparison

Market context

Shanghai’s late-summer heat is still the key backdrop here: August in the city is typically hot and humid, with forecast ranges commonly clustering around the low 30s Celsius and only modest overnight relief. AccuWeather’s August outlook for Shanghai shows daily highs of about 82–92°F, while other month pages put typical August daytime temperatures around 30–32°C and note that the month regularly delivers very warm conditions rather than a single standout cool spell.[1][4][8]

That framing explains why the market’s crowd-implied 0% YES looks hard to reconcile with the weather set-up itself, even before accounting for the specific station used for settlement. Several current forecasts for 4 August point to highs in the mid-30s Celsius: one detailed forecast gives 34°C with no rain through the day, another shows 34°C/26°C with patchy rain possible, and a third models around 33°C early and 34°C at midday.[2][3][17] Long-run August climate pages also show that Shanghai can push into the mid-30s and occasionally higher, with some guides describing peak August values near 38–40°C in extreme years.[7][14]

The main trading catalysts are the live day-of-temperature readings and any shift in the local forecast from a hot, stable air mass towards cloud, rain or a stronger sea breeze. For this market, the relevant settlement source is Shanghai Pudong International Airport Station on Wunderground, so traders should watch whether the airport forecast diverges from citywide Shanghai guidance, especially if showers develop or winds cool the coastal station relative to inland readings. Current day-ahead forecasts still lean hot, and Met Office guidance for Shanghai also shows very warm conditions with daytime maxima well above 30°C, reinforcing the risk that the eventual high lands in a materially warmer band than the market price implies.[18]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Highest temperature in Shanghai on August 4?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

Are prediction markets better than sports betting?

Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.