Highest temperature in Hong Kong on June 17?

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Market context

Hong Kong's maximum temperature on 17 June 2026 will be recorded by the Hong Kong Observatory and published in their Daily Extract dataset, measured to one decimal place in Celsius. The settlement window closes at 12:00 UTC on that date, after which the Observatory's official reading becomes the binding resolution source. Current crowd pricing at 0% YES suggests either extreme confidence in a specific temperature band or minimal liquidity across the full range of possible outcomes.

June sits within Hong Kong's pre-monsoon season, when daily highs typically range between 29–33°C, though heat waves can push readings above 35°C. Historical data from the Observatory shows that extreme heat events (above 36°C) occur roughly once every five to ten years in mid-June. The 0% probability assigned to at least one outcome band indicates traders may be concentrating positions in the 30–33°C range based on seasonal norms, or the market lacks sufficient depth to price tail outcomes fairly. Comparable June dates from recent years provide calibration: 2023 saw a high of 32.8°C on 17 June, whilst 2022 recorded 31.5°C.

Traders should monitor the Observatory's ten-day forecast updates and any tropical cyclone warnings issued by the Regional Specialized Meteorological Centre, which can materially shift temperature trajectories. The China Meteorological Administration's seasonal outlook, typically released in May, may also signal whether the 2026 pre-monsoon period is tracking warmer or cooler than the thirty-year average. Settlement depends entirely on the Observatory publishing finalised data; any delays in their Daily Extract release would postpone resolution.

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — are listed with their platform attributes, because they operate off-chain and a 1:1 comparison of contract mechanics isn't possible.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

Is this market available outside the US?

BTC Prediction 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.

What does it cost to trade on BTC Prediction?

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

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, BTC Prediction triggers a quick verification flow that finishes in minutes.