Highest temperature in Hong Kong on July 6?

Platform comparison

Market context

On 6 July 2026, Hong Kong will record its peak daily temperature, a figure that determines the outcome of a prediction market where the crowd currently assigns zero probability to a “YES” result for any specific range. This event hinges on the Hong Kong Observatory’s official “Absolute Daily Max” reading, finalized in the Daily Extract, which measures temperature in Celsius to one decimal place. For a power-user building automated trading bots or conditional order systems, the market is programmatically approached by parsing the Observatory’s climate data feed once the Daily Extract is published, triggering execution only when the verified value crosses the threshold.

Historical July data frames the current 0% probability as a misreading of seasonal trends. The Hong Kong Observatory’s seasonal forecast for July–September 2026 expects normal to above-normal temperatures, with July’s early days averaging highs near 30.4°C [1][2]. In past years, July 6 has frequently reached 31°C or higher, making the zero probability for a high range statistically inconsistent with the above-normal temperature outlook [5][9]. A trader evaluating tooling should note that the crowd’s dismissal ignores the ENSO-driven warmth signal and the typical volatility of early-July heat in Hong Kong.

The key catalysts to monitor are the Observatory’s Daily Extract release schedule and any sudden shifts in regional cloud cover or rain patches, which directly suppress peak temperatures. Recent forecasts indicate mainly cloudy conditions with light rain patches through 9 July, potentially capping the high below 31°C [6]. However, the seasonal trend of above-normal heat remains the dominant factor, and a bot should be configured to watch for the Daily Extract’s finalisation, as the market cannot resolve until this data is officially published [1][7]. Traders must track the exact timing of the extract’s release to avoid premature execution.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Hong Kong on July 6? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.