Highest temperature in Hong Kong on July 24?

Platform comparison

Market context

Hong Kong’s observed high on 24 July is the key temperature print, and the market is pricing a **0% YES** outcome, so the favourite is firmly anything other than the target band. For handicapper purposes, that makes the **underdog** in this contract the bucket that contains the day’s actual maximum, with the consensus effectively assuming the final figure will land outside the specified range. In late July, Hong Kong typically sees daily highs around **32°C**, with WeatherSpark showing averages near that level and only modest day-to-day variation, so the market’s zero price is less a forecast of a cool day than a statement that traders see the contract’s chosen range as out of the money relative to the likely peak. [1]

The comparable angle is that Hong Kong’s summer temperature distribution is normally tight, but a one-day settlement can still turn on a small difference at the top end: a maximum of 31.9°C versus 32.0°C can matter if the outcome bands are narrow. WeatherSpark’s July profile suggests the climatological centre of gravity is near 32°C, which is where any contrarian value would sit if the market has over-discounted an ordinary hot-day reading. With a 0% implied probability, the consensus is already at the extreme, so the only real value spot is a temperature that lands in the contract’s band despite typical midsummer heat. [1]

The main catalyst is the Hong Kong Observatory’s final daily extract, because the market settles on the **Absolute Daily Max (deg. C)** once the data are published and finalised. Traders should watch the Observatory’s normal publication timing and any late data updates, since the contract cannot resolve until that file is posted; the set-up is therefore driven more by official reporting than by intraday swings. The only recent external reference in the data provided is another Hong Kong weather market on Polymarket, which also shows the crowd clustering tightly around hot-weather outcomes, reinforcing that summer heat is the baseline assumption rather than the edge. [2]

Sources: 1 · 2

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 Who Will Win, 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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 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.