Highest temperature in Hong Kong on June 15?

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Market context

On 15 June 2026, the Hong Kong Observatory will record a daily maximum temperature in Celsius, and this market resolves to whichever temperature band contains that single recorded value. The settlement window closes at midday UTC on that date, though resolution cannot occur until the Observatory publishes its official daily extract data—typically available within 24 hours of the observation period. Polymarket currently prices all temperature ranges at zero, reflecting either insufficient liquidity or genuine uncertainty about which bracket will ultimately contain the day's high; traders holding USDC on Polygon can deploy conditional tokens across multiple outcomes, but the 0% crowd probability suggests minimal conviction in any single range at present.

Hong Kong's June climate is remarkably consistent year-on-year. Historical data from the Observatory shows June daily maxima cluster between 29°C and 33°C, with extremes rarely exceeding 34°C or falling below 28°C. The 30-year average for mid-June sits around 31°C. Anomalous heat events—temperatures above 35°C—occur perhaps once every five to ten years in June, whilst cooler spells below 27°C are equally rare. This historical distribution should anchor expectations; the crowd's current indifference may reflect genuine difficulty in pricing a specific day's outcome rather than any fundamental dispute about seasonal norms.

The key catalyst is the El Niño or La Niña phase active in early 2026, which influences tropical Pacific temperatures and regional monsoon patterns. Secondary factors include any tropical cyclone activity in the South China Sea during early-to-mid June, which could suppress temperatures through cloud cover and rainfall. The Hong Kong Observatory publishes monthly climate outlooks; traders should monitor their May 2026 forecast for seasonal temperature guidance. Humidity levels and wind patterns from the southwest monsoon will also shape the day's maximum, though these remain unpredictable beyond a fortnight in advance.

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 Legit?, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Legit?, 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 Legit? 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.

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.

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.