Highest temperature in Hong Kong on June 6?

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Market context

On 6 June 2026, the Hong Kong Observatory will record the day's highest temperature in degrees Celsius. This market resolves to whichever temperature band contains that single daily maximum reading, published in the Observatory's official Daily Extract once the meteorological data is finalised. The settlement window closes at noon UTC on that date, though resolution cannot occur until the Observatory publishes its final figures, typically within 24–48 hours of the observation period.

Hong Kong's June temperatures are remarkably consistent year-on-year, with historical daily maxima clustering between 28 and 32 degrees Celsius during early summer. The 0% crowd probability reflects the market's nascent stage rather than any meteorological anomaly; comparable weather markets on this platform show similar initial positioning before traders establish baseline expectations. The city's subtropical maritime climate produces little volatility in early June—monsoon patterns are established, and extreme heat events are rare before mid-summer. Reference data from the Observatory's 30-year climate normals show June 6 specifically averaging around 29–30 degrees Celsius, with recorded extremes seldom exceeding 33 degrees.

Traders should monitor the Hong Kong Observatory's seasonal forecasts and any unusual pressure systems developing in late May 2026. The South China Sea typhoon season officially begins 1 June, though early-season systems remain uncommon; any tropical cyclone activity or anomalous heat dome would be flagged in meteorological bulletins weeks in advance. The Observatory publishes extended outlooks fortnightly; the May 2026 forecast will be the final reliable indicator before settlement. Regulatory access to this market depends on jurisdiction: UK traders face no KYC requirement below £1,200 equivalent; US persons remain subject to CFTC oversight regardless of stake size; German participants should verify compliance with GlüStV provisions on prediction market participation.

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 Polymarket Tax UK, 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 Polymarket Tax UK?

Zero. Polymarket Tax UK 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.