Highest temperature in Hong Kong on July 24?

Platform comparison

Market context

Hong Kong’s highest temperature on 24 July is the kind of late-summer outcome that usually sits in the low 30s Celsius, with July averages around 32°C and occasional spikes into the mid-30s. For a one-day settlement like this, the relevant comparison is not the monthly average but the daily maximum reported by the Hong Kong Observatory, which can be pushed higher by strong sunshine, weak wind and dry air even in a rainy month. Historical climatology for Hong Kong in July shows a typical high near 32°C and generally hot, humid conditions throughout the month.[1][2]

The current **0% YES** crowd price looks detached from that climatology, because a zero-implied outcome would usually require the contract’s target temperature band to be viewed as essentially impossible. That is hard to reconcile with July norms in Hong Kong, where daily highs are normally clustered around the low 30s and very warm days are common.[1][2] By contrast, on a comparable Hong Kong weather contract, Polymarket’s live market for the *lowest* temperature on 24 July 2026 has been pricing the warmest band and the coolest band at roughly the same level, showing how prediction markets can split sharply by contract design even within the same city and date.[4]

The key catalyst is the Hong Kong Observatory’s final daily extract, because this market cannot settle until the “Absolute Daily Max (deg. C)” for 24 July 2026 is published and finalised. Traders should watch the Observatory’s day-of forecast and any very short-range updates for heat advisories or thunderstorm activity, since either can shift the realised maximum temperature by a couple of degrees. A recent Hong Kong news report said the Observatory was forecasting extreme heat around 35°C on 24 July, which would support the upper end of the usual July range if it held through the afternoon.[3]

Sources: 1 · 2 · 3 · 4

Methodology

We track Highest temperature in Hong Kong on July 24? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.