Highest temperature in Hong Kong on June 15?

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Market context

Hong Kong's daily maximum temperature on 15 June 2026 will be recorded by the Hong Kong Observatory and published in their Daily Extract dataset. The settlement hinges on the "Absolute Daily Max (deg. C)" figure logged for that specific date, measured to one decimal place. Because the market closes at 12:00 UTC on the settlement date itself, real-time access to the Observatory's published data becomes critical—the official figure typically appears within hours of the observation period closing, but delays occasionally occur during system updates or data validation.

Historical June temperatures in Hong Kong cluster between 28°C and 34°C for daily maxima, with extreme readings above 35°C occurring roughly once per decade during early summer heat waves. The 0% crowd probability suggests either a technical glitch in market initialisation or genuine uncertainty about which temperature band will resolve. Comparing adjacent months and years reveals June typically sits cooler than July and August, making the highest-temperature brackets less probable than mid-range outcomes. Traders building conditional orders should reference the Observatory's 30-year climate normals and recent June anomalies to calibrate their thresholds.

Programmatic traders will need to monitor the Hong Kong Observatory's data release schedule and set up automated feeds from their climate information system. The market cannot settle until official publication, so building in a buffer window beyond the 12:00 UTC deadline is essential. Weather forecast models from the European Centre for Medium-Range Weather Forecasts and the Global Forecast System become increasingly reliable 10–14 days before the date; tracking these alongside local meteorological alerts will signal whether unusual heat patterns are developing in the region.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket App UK, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket App 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?

Polymarket App 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.

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.