Highest temperature in Hong Kong on June 12?

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Market context

The Hong Kong Observatory will record the highest temperature in Hong Kong on 12 June 2026, with settlement determined by the absolute daily maximum reading in degrees Celsius. The market currently shows 0% implied probability across all temperature bands, suggesting either insufficient trader participation or a technical issue with pricing, rather than genuine consensus that no temperature will be recorded.

June sits within Hong Kong's pre-monsoon season, when daily maxima typically range between 28°C and 33°C. Historical data from the Observatory shows that temperatures exceeding 35°C on this date are rare but not unprecedented; the long-term average high for mid-June hovers around 31°C. The 0% reading across all outcomes is an outlier compared to seasonal norms and suggests the market may be underweighting the certainty that some temperature will be recorded and published by the Observatory.

Traders should monitor the Hong Kong Observatory's seasonal forecasts and any updates to their data publication schedule, particularly given that the settlement window closes at noon on 12 June itself. The Observatory typically publishes daily climate data within 24 hours of observation, though delays occasionally occur during severe weather events. Any disruption to monitoring equipment or reporting procedures could delay resolution, though this would not affect the underlying temperature reading. Current atmospheric conditions and any tropical systems developing in early June 2026 will be the primary drivers of actual temperature outcomes.

Methodology

This page reviews Highest temperature in Hong Kong on June 12? 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

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

Is this market available outside the US?

Who Will Win 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.

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.

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.