Highest temperature in Hong Kong on June 10?

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Market context

Hong Kong's highest daily temperature on 10 June 2026 will be recorded by the Hong Kong Observatory and published in their Daily Extract dataset. The settlement hinges on the official "Absolute Daily Max (deg. C)" figure, rounded to one decimal place, which typically becomes available within days of the observation date. This is a straightforward weather measurement with no ambiguity in source or methodology—the Observatory has maintained consistent temperature recording protocols across its network of stations for decades.

June in Hong Kong sits within the pre-monsoon season, characterised by warm, humid conditions with average daily highs around 31–32°C. Historical data shows June extremes rarely exceed 36°C in the urban core, though isolated inland or elevated locations occasionally record higher readings. The 0% crowd probability suggests either extreme confidence in a specific temperature band or insufficient liquidity to establish meaningful odds. Reviewing the Observatory's climate archives for comparable June dates provides the empirical foundation for calibrating range expectations; traders should cross-reference the 1981–2010 normal dataset against recent years' trending patterns, as urban heat island effects have gradually shifted baseline temperatures upward.

Programmatic traders monitoring this market should automate data ingestion from the Observatory's Daily Extract feed, which publishes finalized readings typically by 09:00 UTC the following day. Setting conditional orders keyed to the publication timestamp eliminates manual resolution lag. The settlement window closes at 12:00 UTC on 10 June 2026, allowing a narrow window for same-day trading adjustments once preliminary readings surface through weather services or local news outlets covering the day's conditions.

Methodology

We track Highest temperature in Hong Kong on June 10? 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

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.

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.

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.