Highest temperature in Hong Kong on July 8?

Platform comparison

Market context

On 8 July 2026, Hong Kong will experience its peak daytime heat, measured by the Hong Kong Observatory as the highest temperature in degrees Celsius for that day. In prediction markets, a YES share pays out if the recorded temperature falls within a specific range defined by the market, while a NO share wins if the temperature lands outside that range. This particular market asks whether the daily maximum will reach a specific threshold, with the current crowd-implied probability of 0% for YES suggesting traders believe the target temperature is highly unlikely to be hit.

Historical July data frames this low probability: Hong Kong’s July daily highs typically range from 86°F to 94°F (30°C to 34°C), with the average high near 88°F (31°C). The Hong Kong Observatory’s monthly forecast for July 2026 indicates normal to above-normal temperatures, driven by global warming and current ENSO conditions, yet the market’s 0% YES price implies the specific range in question sits well above recent peaks or is misaligned with climatological norms. Traders should note that even in above-normal years, temperatures rarely exceed 35°C, making extreme bins statistically thin.

Key catalysts include the Observatory’s official release of the “Absolute Daily Max” in the finalised “Daily Extract”, which will settle the market once published. Traders must monitor the Observatory’s 48-hour forecast updates and any sudden shifts in cloud cover or trough passages, as these can suppress peak temperatures. Recent forecasts for early July show mainly cloudy conditions with light rain patches, which typically cap maximums below 32°C. The market cannot resolve until the Observatory publishes the finalized data, so timing the release is critical for position management.

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Methodology

This page reviews Highest temperature in Hong Kong on July 8? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Market UK, which mirrors 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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 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.

Do I need to KYC for this market?

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

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.