Highest temperature in Hong Kong on June 24?

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Market context

The underlying event is the highest temperature recorded by the Hong Kong Observatory on 24 June 2026, measured in degrees Celsius to one decimal place. Historical data frames the current 0% crowd-implied probability for a specific range as highly conservative, given that Hong Kong recently hit 34.8°C, its hottest temperature of the year, with many areas reaching near 35°C[1]. The Observatory’s seasonal forecast for June–August 2026 explicitly predicts above-normal temperatures, while the annual outlook warns 2026 could rank among the top ten hottest years on record[2][7]. Recent extreme heat warnings even forecasted temperatures hitting 37°C, suggesting the market may be underestimating the likelihood of higher ranges despite the current zero probability[5].

Traders should monitor the Hong Kong Observatory’s finalised “Daily Extract” for the absolute daily maximum, as the market cannot resolve until this official data is published[1]. Key catalysts include tropical cyclone activity and monsoon shifts, which directly influence peak temperatures in late June. The Observatory’s latest services and tropical cyclone predictions for 2026 will be critical for assessing whether extreme heat persists[8]. While crypto markets often tie weather contracts to BTC/ETH macro flows, this specific contract’s settlement in USDC on-chain mechanics remains independent of exchange spot or funding rates, focusing purely on the verified meteorological output[1]. Whale flows in weather-related prediction markets may shift if funding rates suggest heightened volatility in climate derivatives, though no direct BTC/ETH macro tie-in currently materialises for this weather-specific resolution[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Hong Kong on June 24? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed for comparison. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

Where can I trade this market with the lowest fees?

On BTC Prediction, 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.

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 BTC Prediction?

Zero. BTC Prediction 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.

Do I need to KYC for this market?

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