Highest temperature in Hong Kong on July 28?

Platform comparison

Market context

Hong Kong's peak daily temperature on 28 July 2026 will be recorded by the Hong Kong Observatory and settled against the specified range in Celsius to one decimal place. The settlement window closes at 12:00 UTC on that date, though resolution cannot occur until the Observatory publishes its official daily extract data, which typically follows within days of the observation period.

July represents the height of Hong Kong's summer monsoon season, when daily maxima routinely exceed 32°C. Historical data from the Observatory shows that late July temperatures in the territory cluster between 32–34°C under typical conditions, with extremes occasionally reaching 35°C or higher during heat waves. The 0% crowd probability suggests either no traders have positioned yet or the market's range structure places all outcomes outside current expectations—a common pattern in weather markets with granular temperature bands that require precise calibration against seasonal norms.

The key dependency is the timing and intensity of the Southwest Monsoon system affecting the Pearl River Delta region. Tropical cyclone activity, upper-level ridge positioning, and urban heat island effects in Hong Kong's dense urban core all influence daily maxima. Traders should monitor the Hong Kong Observatory's seven-day forecasts and any tropical cyclone alerts issued in early July 2026, as these will signal whether conditions favour above-normal or below-normal temperatures for the settlement date. The Observatory publishes updated forecasts daily at weather.gov.hk, providing the primary signal for recalibrating position expectations as the date approaches.

Methodology

This page reads Highest temperature in Hong Kong on July 28? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

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