Highest temperature in Beijing on July 31?

Platform comparison

Market context

Beijing’s heat risk on 31 July is driven by a summer climate that is already close to its seasonal ceiling, with July typically the warmest month in the city and average highs around 31–32°C. Historical data for Beijing show that late-July afternoons regularly reach the low-30s, while the all-time highs for the month sit much higher, with records above 40°C in recent years.[1][3][6]

The market’s 0% crowd-implied probability for **YES** looks anchored to the idea that the airport station will not print an extreme outlier, but that is not the same as saying a hot day is unlikely. Comparable 31 July climatology shows an average high near 31°C and a historical extreme high for that date of 37°C in Beijing data compiled from long-run weather records, so a reading in the upper 30s is rare but within the historical range.[2][6] Beijing has also produced 41.6°C at the city level in July 2023, underlining that severe heat events do occur in the broader climate even if they are not typical on any single day.[1][4]

Traders should watch whether a strong ridge or stagnant, humid air mass builds over north China, because that is the main catalyst for an airport station to overshoot the usual early-30s band. The key dependency is the airport-specific hourly maximum on Wunderground, not a citywide forecast, so cloud cover, afternoon rain, or a shift in winds can cap the day’s peak even if the broader Beijing forecast looks hot. Recent Beijing July guidance still shows the month as hot and humid, with sunshine and rainfall varying sharply day to day, which makes the settlement outcome sensitive to the exact timing of any convection or frontal passage.[11][15]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Beijing on July 31?. 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 or Manifold.

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.

How fast do sports winnings settle?

Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.

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.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.