Highest temperature in Hong Kong on June 24?

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Market context

The Hong Kong Observatory is forecasting above-normal temperatures for June 2026, with daily highs expected to reach between 31°C and 33°C, while recent records show the city hitting 34.8°C earlier this year[1][9]. This seasonal outlook, driven by the current ENSO status and climate models, suggests a high probability of the warmest top 10 years on record, making the current 0% YES implied probability for a specific temperature range on 24 June appear starkly divergent from analyst consensus[1][8]. Historical data from June 2025 and 2024 confirms that extreme heat events are common, with temperatures frequently soaring past 34°C, indicating that the market may be underpricing the likelihood of a record-breaking day[6][9].

Traders should monitor the Observatory’s upcoming "Daily Extract" publications and any extreme heat warnings issued for the New Territories, where temperatures have previously hit 37°C[4]. The settlement window ends on 24 June 2026 at 12:00 UTC, meaning the final resolution depends entirely on the finalized "Absolute Daily Max" data once published[1]. Recent news from the South China Morning Post highlights that Hong Kong has already recorded its hottest day of the year at 34.6°C, reinforcing the need to watch for similar spikes in the coming weeks[6]. The divergence between sportsbook lines, which often overreact to short-term weather, and the prediction market’s flat 0% probability suggests a potential mispricing that could be corrected as the forecast period narrows[1][6].

Sources: 1 · 2 · 3 · 4 · 5

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

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 Best Prediction Markets, 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.

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.