Highest temperature in Hong Kong on June 1?

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Market context

The Hong Kong Observatory will record the highest temperature in degrees Celsius on 1 June 2026, with settlement tied to the official "Absolute Daily Max" figure published in their Daily Extract once the date has passed. The market resolves to a specific temperature range bracket, measured to one decimal place, with USDC settlement on-chain following data confirmation from the Observatory's climate database.

Hong Kong's June temperatures are historically stable within a narrow band. The territory's mean daily maximum in early June typically ranges between 29–31°C, with extreme heat days occasionally pushing toward 34–35°C. Historical records show that June 1st specifically has rarely exceeded 33°C in the past two decades; the 0% crowd probability reflects the market's assessment that the highest temperature will fall within the lowest available bracket on offer. This baseline expectation aligns with seasonal climatology for the South China coast during the early monsoon transition period.

Traders should monitor the Hong Kong Observatory's seasonal forecasts and any published anomaly alerts in late May 2026, as tropical systems or unusual pressure patterns could shift outcomes. The settlement window closes at 12:00 UTC on 1 June, but final resolution depends on the Observatory's publication schedule for that day's data—typically available within 24–48 hours. Any significant weather system approaching the region in the week prior would be the primary catalyst to reassess probability distributions away from historical norms.

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

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 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.

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.