Highest temperature in Hong Kong on July 27?

Platform comparison

Market context

Hong Kong’s highest temperature on 27 July will be set by the Hong Kong Observatory’s daily extract, which records the day’s **Absolute Daily Max** in Celsius to one decimal place. For a programmatic workflow, that means the cleanest approach is to watch for the final HKO publication rather than intraday weather feeds, then map the published max into the market’s outcome bands once the data is marked final. [2]

July is normally Hong Kong’s hottest month, with average highs around **32°C**, but it is also one of the wetter periods, with heavy rain and storms possible. That seasonal mix matters for probability interpretation: a very low current price can still be rational if the market is waiting for the final official reading, because the settlement is driven by a single observed maximum rather than the whole day’s forecast. In practice, power users often model this kind of market off ensemble forecasts, then use conditional orders around threshold temperatures such as 31°C, 32°C and 33°C, where small forecast revisions can move the correct range. [1][3]

The main catalysts are the Observatory’s observation schedule, any weather alerts for thunderstorms or heavy rain, and the timing of the final daily extract becoming available on the climate page. Polymarket’s own market page says resolution is on or around 27 July 2026, but it also notes the market cannot resolve until the data for that date has been published, so a bot should keep polling the source page and only act once the extracted maximum is finalised. [2]

Sources: 1 · 2 · 3

Methodology

We track Highest temperature in Hong Kong on July 27? 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

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.

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot UK 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.