Pronóstico: Highest temperature in Chicago on August 9?

Platform comparison

Market context

Chicago O’Hare’s high on 9 August sits inside a very familiar late-summer band rather than an extreme outlier. The National Weather Service lists Chicago’s August normal maximum at about 83°F, with the record for 9 August at 97°F, so the day’s outcome typically depends on whether the city is under ordinary summertime warmth or a brief heat spike.[2][11][12] Weather Underground’s resolution rule also matters: the market settles on the highest value in the Daily Observations table, not the summary “Day High & Low” figure, so traders should focus on the station’s observed readings rather than forecast-style headline numbers.[3]

The crowd’s 0% YES pricing is hard to square with the climate baseline if the intended bin is anything at or above the low- to mid-80s, because official and third-party data already showed Chicago around 84°F on 9 August and AccuWeather’s monthly page had the city at 87°F for that date, close to normal for early August.[1][2][11] For context, Chicago’s hottest spell in 2026 reached 96°F on 9 July, proving the market can move sharply when a genuine heat ridge is in place, but that was a separate setup from this August date.[13]

For traders, the key catalysts are the final O’Hare observations on the day itself, any late-day revisions posted before the next calendar day appears in Weather Underground, and whether thunderstorms or cloud cover cap the afternoon maximum below the expected bin.[3][5] The National Weather Service’s Chicago forecast discussion and local station updates are the most relevant live inputs for whether the day peaks in the low 80s, mid-80s, or higher, with the market remaining sensitive until the last valid observation is logged.[5][2]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Pronóstico: Highest temperature in Chicago on August 9?. 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.

Can I bet on individual matches?

Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.

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.