Highest temperature in Hong Kong on June 12?

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Market context

The Hong Kong Observatory will record the highest temperature on 12 June 2026 and publish it as a single decimal-point Celsius figure in their Daily Extract dataset. This market resolves based on which temperature band that official reading falls into, with settlement in USDC once the Observatory finalises the data, typically within days of the observation date.

Hong Kong's June temperatures are highly predictable within narrow bounds. Historical records show daily maxima in mid-June cluster between 29°C and 33°C, with extreme outliers rare. The 0% crowd probability suggests traders are either awaiting resolution or treating this as a baseline weather event with minimal volatility compared to crypto macro moves. June sits outside Hong Kong's typhoon season proper, reducing the tail-risk scenarios that could drive temperatures sharply above seasonal norms. Comparable June 12 readings from prior years provide a tight reference frame; the Observatory's 30-year climate normals show this date typically peaks around 31–32°C.

The key dependency is the Observatory's publication schedule. Data becomes available through their online climate portal once quality checks complete, usually by mid-June. Traders should monitor any unusual weather systems—tropical depressions or heat domes—tracked by regional meteorological services in early June 2026. The settlement window closes at 12:00 UTC on the resolution date itself, leaving minimal time for late-breaking adjustments. Unlike volatile crypto funding rates or spot moves, this contract hinges entirely on a single, non-negotiable instrumental reading published by a government agency with no discretion in measurement methodology.

Methodology

This page reads Highest temperature in Hong Kong on June 12? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed for comparison. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

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.