Pronóstico: Highest temperature in Hong Kong on July 7?

Platform comparison

Market context

The underlying real-world event is whether Hong Kong’s highest temperature on 7 July 2026 will reach 30°C, a threshold that currently carries a 0% YES probability on Polymarket. This contract, priced in USDC on the Polygon network using conditional tokens, reflects a market consensus that such a high is virtually impossible for that specific date, despite July being Hong Kong’s hottest month overall.

Historical data frames this improbability sharply: while daily highs in July typically hover around 32°C (89°F), rarely dipping below 30°C, the highest recorded monthly mean maximum is 32.9°C in July 2007[6]. Yet, 7 July has never been a peak day; the observatory’s records show no instance where 30°C was missed on this date, but the current 0% pricing suggests traders believe a 30°C hit is unlikely, possibly due to seasonal variability or forecast anomalies. Recent forecasts for July 2026 indicate highs between 86°F and 95°F (30°C–35°C), with averages near 30°C, yet the market’s 0% stance implies a specific expectation of cooler conditions on 7 July[7].

Traders should monitor the Hong Kong Observatory’s upcoming “Daily Extract” releases, which finalise the “Absolute Daily Max” data for 7 July once published[6]. Key catalysts include any sudden heatwave announcements or shifts in the regional monsoon pattern, which could alter temperature trajectories. A recent report from the South China Morning Post noted Hong Kong recorded its hottest day of the year so far at 36.1°C, breaking a 1963 record, underscoring the volatility of extreme heat events that could influence this market’s outcome[8]. The settlement window ends 12:00 UTC on 7 July 2026, so timely data access is critical for on-chain resolution.

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Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Qué Es, which mirrors the Polymarket order book directly.

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

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Qué Es trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.