Highest temperature in Hong Kong on June 22?

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Market context

Hong Kong’s highest temperature on 22 June will be set by the Hong Kong Observatory’s final “Absolute Daily Max” entry for the day, so the practical question is whether the Observatory peaks in the low 30s Celsius or stays a little below that. June in Hong Kong is typically hot, humid and wet, with long-run June daytime maxima around 30°C and the Observatory’s summer outlook for June to August 2026 calling for above-normal temperatures, which keeps the upper ranges relevant for settlement and for any rule-based trader trying to map forecast bands to the market’s buckets.[2][4]

The current 0% yes price is easiest to read as a data problem rather than a weather view: there is no published final reading yet, and this market cannot resolve until the relevant Daily Extract is posted by the Hong Kong Observatory.[4] Programmatically, this is the kind of contract that is usually handled by polling the Observatory source after the settlement window, then matching the final one-decimal Celsius maximum to the market’s interval definitions; if your tooling uses bots, conditional orders or copy-trading, the useful trigger is not intraday heat but the first appearance of the finalized extract.[4][10]

For historical context, Hong Kong’s Observatory has shown that even relatively warm months can still produce maxima in the high 20s rather than extreme heat, with February 2026 topping out at 27.9°C and January reaching 24.8°C on their warmest days.[5][8] Against that backdrop, a June reading has to clear the seasonal baseline for the market to move into the hotter bins, and traders should watch the Observatory’s seasonal temperature outlook, the daily weather narrative, and any typhoon-related disruptions that can suppress daytime heating or alter the timing of the day’s peak.[4][10]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Hong Kong on June 22? 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Review 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 Review 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Review UK triggers a quick verification flow that finishes in 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.