Highest temperature in Hong Kong on May 26?

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Market context

The Hong Kong Observatory will record the highest temperature in Hong Kong on 26 May 2026, measured in degrees Celsius. The market currently shows 0% implied probability across all temperature ranges, suggesting either incomplete market formation or a technical settlement issue, as historical data always resolves to some recorded value once the Observatory publishes its daily extract.

Hong Kong's May temperatures typically range between 28–32°C, with occasional peaks above 33°C during early-season heat waves. The Observatory's absolute daily maximum for May across the past two decades shows clustering around 31–32°C as modal outcomes, with roughly 15–20% of days exceeding 33°C. The 0% crowd probability indicates no consensus has formed on which range will contain the actual reading, rather than genuine uncertainty about whether a temperature will be recorded. This is unusual for a weather market with a fixed settlement date and a single, verifiable source.

Traders should monitor the Hong Kong Observatory's published daily extracts beginning 27 May 2026, when preliminary data typically becomes available. The settlement window closes at 12:00 UTC on 26 May, meaning resolution depends on the Observatory's finalised figures rather than real-time readings. Regional weather patterns—particularly whether a subtropical high-pressure system or monsoon influence dominates—will determine whether the day trends toward typical May conditions or elevated heat. The absence of any probability mass suggests the market may require initial price discovery once data publication approaches.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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?

On Who Will Win 2026, which mirrors the Polymarket order book at 0% fees. 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'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.

What does it cost to trade on Who Will Win 2026?

Zero. Who Will Win 2026 routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.