Highest temperature in Hong Kong on July 24?

Platform comparison

Market context

Polymarket is pricing this Hong Kong temperature contract at **0% YES** right now, which means the market is effectively saying there is no live expectation that the Hong Kong Observatory will publish a qualifying highest temperature for the July 24 settlement window. The position is held in **USDC** on **Polygon**, with outcome exposure represented through **conditional tokens**, so the practical question for users is not the weather in general but whether the official Observatory extract lands in a range that matches the contract rules.

For context, Hong Kong’s July climate is usually already at the hot end of the annual range. WeatherSpark’s climate normals put average daily highs for July at about **32°C**, with readings rarely below **29°C** or above **34°C**, which helps explain why traders often treat late-July temperature markets as firmly anchored around the low-30s rather than at extreme heat levels. The current 0% price is therefore less a forecast of “cool weather” than a reflection that the contract needs a specific official print, and that the listed probability is not a broad temperature opinion but a live market on the exact resolution bands.

The main catalyst is the Hong Kong Observatory’s publication of the **Daily Extract** for 24 July, because the market resolves from the finalised **“Absolute Daily Max (deg. C)”** once that data is posted. Traders should watch for the Observatory’s timing, any delay in finalisation, and the exact one-decimal reading, since the contract only settles after the relevant extract is published. In practice, the on-chain price can move quickly once the official figure is visible, but until then the market is trading around publication risk as much as the day’s heat.

Sources: 1

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 UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 UK. 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 does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

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