Highest temperature in Hong Kong on June 23?

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Market context

The highest temperature Hong Kong records on 23 June 2026 will be measured in degrees Celsius by the Hong Kong Observatory, with the market resolving to the specific range containing that daily maximum. Today, Polymarket prices this contract at 0% for the YES outcome, reflecting a crowd consensus that the event is virtually impossible under current conditions. This pricing sits on the Polygon network, where USDC funds conditional tokens to lock in bets on the temperature range, with settlement finalised once the Observatory publishes the official "Absolute Daily Max" in its Daily Extract.

Historical June data frames this near-zero probability starkly. Long-term averages show daytime maximums typically reaching 30°C, yet recent extremes have surged far higher; Hong Kong recorded its hottest day of the year so far at 34.6°C just last Friday, while seasonal forecasts for June-August 2026 predict above-normal temperatures[2][7]. The Observatory has already warned of extreme heat hitting 37°C in the New Territories on recent days, suggesting that a 30°C+ reading on 23 June is plausible, making the current 0% pricing appear disconnected from the observed heatwave trend[5][6].

Traders must monitor the Observatory’s upcoming Daily Extract releases and any tropical cyclone announcements, as the tropical cyclone season is likely to start in June or later, potentially disrupting heat patterns[4]. The resolution depends entirely on the finalised data in the Daily Extract, which the Observatory confirms will be available only after the specified date’s information is finalized[1]. A sudden shift in rainfall, forecasted to be normal to below-normal, could sustain the high heat, so watching the official weather bulletins for the Pearl River Delta region is essential before the settlement window closes[2][8].

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

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

Is this market available outside the US?

Polymarket Scam? 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.

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.