Highest temperature in Hong Kong on June 12?

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Market context

On 12 June 2026, the Hong Kong Observatory will record the day's highest temperature in degrees Celsius. A prediction market allows traders to buy YES or NO shares on whether that maximum will fall within a specific temperature band. If you buy a YES share and the Observatory's official reading lands in that range, your share settles at £1; if it falls outside, it settles at £0. A NO share works inversely. The market's settlement depends entirely on the Observatory's published "Absolute Daily Max" figure, recorded to one decimal place, once the data appears in their Daily Extract records.

Hong Kong's June temperatures are remarkably consistent. Historical records show daily maxima in mid-June cluster between 31 and 34 degrees Celsius, with occasional spikes to 35 degrees during early heat waves. The 0% crowd probability suggests traders are pricing in an outcome far outside this typical range—either an unusually cool day or an extreme heat event. June marks the transition toward the summer monsoon season, when humidity rises sharply but temperatures remain within established bounds unless a rare weather system intervenes.

The key dependency is the monsoon's onset timing and intensity in early June 2026. The Hong Kong Observatory issues seasonal forecasts and daily updates; traders should monitor their June outlook issued in May for any signals of anomalous conditions. Tropical cyclone activity, though rare in June, could suppress temperatures; conversely, a delayed monsoon arrival might permit higher readings. Settlement cannot occur until the Observatory publishes finalised data, typically within days of the observation date.

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

Is this market available outside the US?

Prediction Market UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Market UK triggers a quick verification flow that finishes in minutes.