Highest temperature in Hong Kong on July 27?

Platform comparison

Market context

Polymarket is currently pricing this Hong Kong temperature contract at **0% YES** across the listed outcomes, which means the market is assigning no visible probability to any specific band at the moment. The event itself is straightforward: the Hong Kong Observatory will publish the **absolute daily maximum temperature** for 27 July 2026 in its daily extract, and the correct conditional token settles against the range that contains that figure once the data is finalised.[1]

For traders, the historical framing is that Hong Kong in July is typically hot, but the spread between outcomes can still hinge on rain, cloud cover, and sea-breeze effects rather than on seasonality alone. The market’s 0% read is unusual in practical terms because each outcome on Polymarket is still redeemable at **$1** if correct, with positions funded and settled on **USDC on Polygon** through conditional tokens, so the contract can move sharply once the Observatory’s daily reporting becomes clearer.[1] A zero print also means the book may be thin enough that even modest order flow can reprice the contract quickly.

The main catalysts to watch are the Hong Kong Observatory’s daily updates, the timing of the final “Daily Extract”, and any weather-system developments affecting southern China and the Pearl River Delta before the close of the settlement window. Any late-day rainfall, an overcast spell, or a hotter-than-expected afternoon reading can matter because the market resolves to the day’s highest observed temperature, not a forecast average.[1][2] If the official extract is delayed, the market should remain open until the source data is published.[1]

Sources: 1 · 2

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

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

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.

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 PolyGram 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.