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 highest temperature of that day in degrees Celsius. A prediction market allows traders to buy YES or NO shares on whether that temperature will fall within a specific range. If you buy a YES share and the actual temperature lands in the specified bracket, your share settles at full value; a NO share pays out if the temperature falls outside that range. The Hong Kong Observatory's official "Absolute Daily Max" measurement, published in its Daily Extract dataset, serves as the sole arbiter of settlement.

Hong Kong's June climate sits at the threshold between late spring and early summer, with daily maxima typically ranging between 29°C and 33°C. Historical data from the Observatory shows considerable year-to-year variation; the 6th of June specifically has seen highs as low as 27.9°C and as high as 34.0°C across recent decades. The current 0% crowd probability suggests traders expect the market's temperature bands to be set at extreme outliers—either unusually cold or unusually hot—making settlement in those ranges highly unlikely given the seasonal norm.

Traders monitoring this market should track the Hong Kong Observatory's seasonal forecasts and any tropical cyclone alerts issued by the Regional Specialized Meteorological Centre, which can dramatically alter temperature patterns. The settlement window closes at noon UTC on 6 June 2026, after which the Observatory typically publishes daily climate data within 24 to 48 hours. Any delays in the Observatory's data release will postpone resolution; traders should confirm publication before settlement finalises.

Methodology

We track Highest temperature in Hong Kong on June 6? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Market 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.

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.

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.