Highest temperature in Hong Kong on July 24?

Platform comparison

Market context

Hong Kong’s highest temperature is set by the Hong Kong Observatory’s **Absolute Daily Max** reading for 24 July, so traders are really modelling a single official number rather than a general weather impression. July is typically the city’s hottest month, with average highs around **32°C** and frequent rain or storms, which means the distribution usually clusters in the low-30s even when showers briefly interrupt the heat[1]. For a programmatic approach, the key input is the HKO daily extract once it is finalised; until then, live forecasts are only a proxy for the eventual settlement value.

Historically, July readings in Hong Kong often sit near **28°C to 32°C**, with occasional excursions above that band during heat events[2]. That makes an implied **0% YES** look like a market price that is either stale or constrained by the settlement setup, rather than a clean read on weather risk. The practical comparison is to recent Hong Kong July extremes: the city has recorded far hotter spikes in past years, including **37°C** during a severe heat episode, so a one-day high in the low-to-mid 30s is entirely plausible when conditions align[3].

For a trader using bots or conditional orders, the main catalysts are the HKO forecast updates, any thunderstorm or heat warnings, and the timing of the final Daily Extract publication, because this market cannot settle until that source is published. On 24 July, local forecasts already flagged **extreme heat** and maximum temperatures around **35°C**, which matters because a single afternoon peak can move the resolved bucket even if morning conditions look benign[4]. In practice, the workflow is to monitor the HKO feed, compare the forecast ceiling against the market’s temperature bands, and avoid assuming the early crowd price reflects the final official reading.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on July 24? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Fees, which mirrors the Polymarket order book at 0% fees.

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 Fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi Fees trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.