Highest temperature in Hong Kong on June 27?

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Market context

The underlying real-world event is the highest temperature recorded by the Hong Kong Observatory on 27 June 2026, measured in degrees Celsius to one decimal place. Today, the Polymarket contract for this event prices the YES outcome at 0%, implying the crowd believes the temperature will fall outside the specific range being traded. This zero probability is stark given the seasonal forecast for June–August 2026, which predicts above-normal temperatures for Hong Kong due to the current ENSO status and climate model guidance[1]. Historical context supports this warmth; June 2026 forecasts show daily highs ranging from 88° to 92° Fahrenheit (approximately 31.1° to 33.3°C), with an average high of 89°F (31.7°C)[2]. Recent records further illustrate the volatility, with Hong Kong hitting 34.6°C (94.3°F) on its hottest day of the year so far just days prior, accompanied by a hail warning[9]. The HKO has also warned of extreme heat in the New Territories, with temperatures expected to hit 37°C, reinforcing that 0% may be an overreaction to the specific range rather than the heat itself[5].

Traders must monitor the HKO’s "Daily Extract" publication schedule, as the market cannot resolve until the "Absolute Daily Max" data for 27 June is finalized and available online[1]. The primary catalyst is the official release of this daily extract, which will confirm the exact temperature to one decimal place. While the seasonal forecast suggests above-normal heat, the specific range in question remains the critical variable. Investors should watch for any sudden shifts in the HKO’s extreme heat warnings or updates on the ENSO status, as these directly influence the probability of the temperature falling into the traded bracket. The on-chain mechanics on Polygon, using USDC and conditional tokens, mean that liquidity will shift rapidly once the data is published, making the timing of the HKO announcement the decisive factor for any position adjustment.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Hong Kong on June 27? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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 does it cost to trade on Polymarket Scam??

Zero. Polymarket Scam? 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.

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.