Highest temperature in Hong Kong on June 20?

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Market context

Hong Kong’s hottest reading on 20 June will be the figure the Hong Kong Observatory publishes in its daily extract, measured to one decimal place, so the practical question for traders is whether the day lands in a familiar June range or pushes into an outlier band. Long-run June climate data point to daytime highs around 30°C, with high heat and humidity typical for the month, while the Observatory’s June–August seasonal outlook says temperatures are expected to be above normal in 2026.[1][3]

For probability reading, the 0% YES price mostly reflects that settlement depends on a specific, not-yet-finalised daily maximum rather than a generic weather expectation. Comparable June climatology suggests the upper 20s to low 30s Celsius are common, and historical extremes show that Hong Kong can briefly reach much hotter levels in June, including a June absolute maximum of 35.6°C recorded in 2025.[1][6] Programmatically, that means a trader would usually map the market bands against the Observatory’s final daily extract rather than react to headline forecasts alone, because a one-tenth-of-a-degree publication can move the winning interval.

The main catalysts are the Observatory’s short-range forecast updates, any tropical disturbance or rain-band track changes, and the timing of the daily extract release, which is the only source that settles the market. AccuWeather’s June outlook still shows a fairly tight high-temperature envelope for Hong Kong, with daily highs around 88°F to 94°F, which is consistent with a market that can jump only if late-day warming, local convection, or an unusually hot airmass lifts the final maximum.[2] For a bot workflow, that usually means monitoring the official forecast feed, then polling the final published extract before the settlement window closes.[5][7]

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

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?

On Polymarket Bot UK, 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.

Is this market available outside the US?

Polymarket Bot UK 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 Bot UK?

Zero. Polymarket Bot UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.