Highest temperature in Hong Kong on June 7?

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Market context

Hong Kong's daily maximum temperature on 7 June 2026 will be recorded by the Hong Kong Observatory and published in their Daily Extract dataset. The settlement hinges on the Observatory's official "Absolute Daily Max (deg. C)" figure, measured to one decimal place. This is a straightforward instrumental reading with no discretionary interpretation—the Observatory operates continuous automated weather stations across the territory, with the daily maximum drawn from the 24-hour period ending at 0000 UTC.

June sits within Hong Kong's pre-monsoon season, historically one of the warmest months before the southwest monsoon establishes itself. Historical daily maxima for early June typically range between 28°C and 34°C, with occasional excursions above 35°C during heat waves. The 0% crowd probability suggests either market liquidity constraints or genuine uncertainty about which temperature band will resolve. Examining the Observatory's climate normals and recent June patterns provides a baseline: the 30-year mean daily maximum for early June hovers around 31–32°C, though individual years show substantial variance.

For programmatic traders, the key dependency is publication timing. The Observatory releases Daily Extract data with a lag; traders cannot settle positions until the official figure appears on their climate database. Automated systems should monitor the Observatory's data portal directly rather than relying on secondary sources, as transcription errors occasionally occur. The settlement window closes 7 June 2026 at 1200 UTC, but actual data availability may extend beyond this if the Observatory delays publication. Conditional orders keyed to specific temperature thresholds are viable once historical volatility patterns are quantified against the available resolution bands.

Methodology

We track Highest temperature in Hong Kong on June 7? 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.

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.

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.

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.