Highest temperature in Hong Kong on July 4?

Platform comparison

Market context

Hong Kong is bracing for peak summer heat on 4 July 2026, with the Hong Kong Observatory set to record the absolute daily maximum temperature in degrees Celsius. The market currently implies a 0% chance of the temperature falling within the expected range, suggesting traders believe the outcome will be an outlier or that data dependencies may prevent resolution. This probability defies historical norms, as July is consistently Hong Kong’s hottest month, often exceeding 31°C in afternoon readings with high humidity.

Historical precedents frame this 0% probability as highly anomalous. July 2022 was the hottest month since records began in 1884, driven by a persistent subtropical ridge that brought prolonged high temperatures [1]. Similarly, July 2024 was exceptionally hot, with a monthly mean maximum of 32.4°C and record-breaking daily highs, including 36.1°C at the Observatory itself [2][3]. In 2021, July was unusually hot with a mean maximum of 32.6°C [8]. Given these consistent records, a 0% implied probability contradicts the climatic reality that July routinely delivers the city’s highest temperatures.

Traders must monitor the release of the “Daily Extract” from the Hong Kong Observatory, which finalises the “Absolute Daily Max” data for 4 July [6]. Resolution cannot occur until this dataset is published, creating a critical dependency on administrative timing rather than weather volatility. Recent news confirms that July 2024 saw the highest number of hot days and nights on record, reinforcing the expectation of extreme heat [4]. Any delay in data publication or an unexpected tropical cyclone—most likely in July to September—could disrupt the settlement window ending 2026-07-04T12:00:00Z [5]. The market’s current stance ignores these structural and climatic certainties.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Highest temperature in Hong Kong 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 (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

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.

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.

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.