Highest temperature in Hong Kong on June 17?

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Market context

The Hong Kong Observatory will record the highest temperature in degrees Celsius on 17 June 2026, with settlement contingent on the official "Absolute Daily Max" figure published in their Daily Extract dataset. The crowd currently assigns zero probability to this event resolving, suggesting either technical uncertainty about the market structure or genuine difficulty in forecasting a specific temperature range eighteen months ahead.

Hong Kong's June climate sits firmly within the pre-monsoon season, when daily maxima typically range between 29°C and 33°C. Historical data from the Observatory shows considerable year-to-year variation; the territory has recorded June highs as low as 27.5°C during cooler years and as high as 35.4°C during heat waves. The 0% probability reading appears disconnected from this established baseline range, indicating traders may be waiting for clarification on which temperature bands the market actually offers as resolution options. Without visibility of the available brackets, positioning remains speculative.

Traders should monitor the Hong Kong Observatory's seasonal forecasts, typically issued monthly, which provide guidance on temperature anomalies relative to the thirty-year normal. The broader Asian weather pattern—particularly the strength and timing of the southwest monsoon onset—will influence whether June 17 falls within a cooler or warmer phase. Recent years have seen increasing frequency of heat alerts across southern China during this period, though Hong Kong's maritime location typically moderates extremes compared to inland regions. Settlement depends entirely on the Observatory publishing its Daily Extract data; any delays in their reporting schedule would postpone resolution.

Methodology

This page reviews Highest temperature in Hong Kong on June 17? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Who Will Win — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 Who Will Win, 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 Who Will Win?

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

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Who Will Win triggers a quick verification flow that finishes in minutes.