Highest temperature in Hong Kong on July 31?

Platform comparison

Market context

Hong Kong’s highest temperature on 31 July will be set by the Hong Kong Observatory’s final “Absolute Daily Max” reading for that date, so the market is really about whether the day produces an exceptional late-July peak rather than the city’s usual summer heat. Recent official and local reporting shows Hong Kong has been living with repeated hot spells: the Observatory said July 2023 included a 36.1°C maximum, one of the highest July readings on record, and in 2024 Hong Kong FP reported a 35.4°C peak after an “exceptionally hot” July[7][16].

That backdrop matters because Hong Kong’s July record list is topped by very high maxima, with the Observatory’s own July ranking showing 35.7°C as the highest monthly maximum in the historical record and 35.6°C close behind[3]. For context, the city’s day-by-day summer highs are often in the low 30s rather than the mid-30s, and live reporting on 31 July 2025 already showed Observatory temperatures around 31°C at mid-afternoon, with hotter readings inland and in the New Territories[8]. That helps explain why a 0% crowd-implied probability may reflect a view that the required top-end outcome is uncommon, not impossible.

The key catalyst is the Observatory’s official publication for 31 July 2026 in the daily extract, which will determine the settled value once finalised[1][3]. Traders should watch the daytime temperature trend at the Observatory headquarters and whether inland districts run several degrees hotter, since recent hot-day reports have often seen the city centre lag the territory’s warmest locations by 2-4°C[8][11]. The market cannot resolve until the Hong Kong Observatory publishes the relevant data, so any late-afternoon surge or a revised final daily extract is the main dependency[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

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

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.