Highest temperature in Guangzhou on July 4?

Platform comparison

Market context

Guangzhou on 4 July 2026 is entering its peak summer phase, with meteorological records confirming July as the hottest month of the year, averaging 28.7°C and frequently reaching highs near 39°C. The crowd-implied 0% probability for a temperature hitting 31°C appears starkly misaligned with historical climatology, as daily highs in early July typically range between 33°C and 35°C, rarely dipping below 30°C.

Historical data from the past decade shows that Guangzhou’s highest daily temperatures in July consistently exceed 31°C, with the record peak hitting 39°C on 25 July 2024. WeatherSpark notes that daily highs in July average 91°F (33°C), rarely falling below 85°F (29.4°C), meaning a 31°C threshold is not an outlier but a baseline expectation for this period. Traders should treat the current 0% probability as a significant market inefficiency rather than a rational assessment of risk.

Key catalysts include real-time updates from Wunderground for the Guangzhou Baiyun International Airport Station, which will settle the market by 12:00 UTC on 4 July. No major weather disruptions or cooling anomalies are forecast for this date, and China Meteorological Administration records indicate stable high-pressure systems typical of early July. A beat-reporter from Xinhua News Agency recently confirmed Guangzhou experienced its longest summer since 1961, reinforcing the likelihood of sustained high temperatures. Traders monitoring settlement should verify the Wunderground feed directly, as no alternative cooling events are anticipated to alter the outcome.

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Methodology

Sports-specific comparison page for Highest temperature in Guangzhou on July 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 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.