Highest temperature in Hong Kong on July 11?

Platform comparison

Market context

Hong Kong faces its peak summer heat on 11 July 2026, with the Hong Kong Observatory set to record the day’s absolute maximum temperature in degrees Celsius. The market currently implies a 0% probability for the “YES” outcome, suggesting traders believe the temperature will fall outside the specified range, though the exact range remains undefined in the prompt. Historical data for mid-July in Hong Kong typically shows daily highs between 30°C and 34°C, with the average warmest day reaching 30.1°C [8]. The Observatory’s seasonal forecast for July–September 2026 predicts normal to above-normal temperatures, influenced by current ENSO conditions [4]. This upward trend mirrors February 2026, which saw temperatures 3.0°C above normal and ranked as one of the second-highest on record for that month [5].

Traders should monitor the Observatory’s daily extract for 11 July, which will publish the finalized “Absolute Daily Max” once data is confirmed [10]. The settlement hinges entirely on this official figure, as the market cannot resolve until the Daily Extract is available. While AccuWeather’s July 2026 forecast suggests highs ranging from 85°F to 94°F (approximately 29.4°C to 34.4°C), the official HKO reading may diverge slightly due to measurement protocols [2]. No immediate weather announcements are scheduled beyond routine forecasts, but the ENSO status remains a key dependency for temperature anomalies [4]. Cross-platform odds comparisons show prediction markets lagging behind sportsbook lines on heat-related contracts, with analyst consensus often favouring above-normal readings in light of 2026’s warm start.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets UK, 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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.