Highest temperature in Hong Kong on June 16?

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Market context

On 16 June 2026, the Hong Kong Observatory will record the day's highest temperature in degrees Celsius. A prediction market allows traders to buy YES or NO shares on whether that maximum will fall within a specific temperature range. Holding a YES share means you profit if the Observatory's official reading lands in your chosen band; a NO share profits if it falls outside. The settlement depends entirely on the Observatory's published "Absolute Daily Max" figure, released after the day concludes.

Hong Kong's June climate is consistently warm and humid, with historical daily maxima typically ranging between 29 and 33 degrees Celsius during mid-month. The 0% crowd probability suggests traders are currently uncertain which temperature bracket to favour, or the market may lack sufficient liquidity to establish consensus. Examining the Observatory's climate records from previous June 16ths provides a baseline: the city rarely experiences extreme heat spikes in mid-June before the peak summer months, though occasional warm surges do occur when tropical systems approach or high-pressure cells dominate.

The key dependency is the monsoon pattern and any tropical cyclone activity in the western Pacific during early-to-mid June 2026. The Hong Kong Observatory issues seasonal forecasts and daily weather advisories that traders should monitor; any official alerts about heat warnings or unusual pressure systems would signal potential deviations from the historical norm. Resolution cannot occur until the Observatory publishes its Daily Extract data, typically within days of the observation date, so traders should expect a brief settlement lag after 16 June.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 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.

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 Prediction Market UK?

Zero. Prediction Market UK 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.