Highest temperature in Hong Kong on July 2?

Platform comparison

Market context

The Hong Kong Observatory will record the absolute daily maximum temperature in degrees Celsius on 2 July 2026, measured to one decimal place, to resolve this prediction market. Today, Polymarket prices the YES contract for any temperature range above freezing at 0%, implying the crowd believes the event is impossible or the data will not resolve. This pricing reflects the on-chain mechanics where USDC on Polygon settles conditional tokens only once the official "Daily Extract" is finalized, a dependency that currently blocks resolution.

Historically, July is Hong Kong’s hottest month, with daytime temperatures typically reaching 31°C and highs often climbing to 32°C or higher, while seasonal forecasts for July–September 2026 predict normal to above-normal temperatures[1][5]. AccuWeather’s July 2026 forecast shows daily highs ranging from 86°F to 96°F (30°C to 36°C), with an average high of 89°F (32°C)[2][7]. The 0% probability is therefore starkly at odds with decades of climatic data, suggesting a potential mispricing or a misunderstanding of the resolution source rather than a genuine expectation of no temperature reading.

Traders should monitor the Hong Kong Observatory’s official "Daily Extract" publication schedule, as the market cannot resolve until this data is finalized[1]. Key catalysts include the ENSO status updates and climate model forecasts that influence the seasonal temperature outlook, which currently points to above-normal heat[1]. Recent weather updates indicate mainly cloudy conditions with light rain patches for the coming week, but these short-term fluctuations do not override the broader seasonal trend of high July temperatures[3]. The resolution hinges entirely on the Observatory’s published "Absolute Daily Max" figure, making the timing of that release the critical dependency for settlement.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on July 2? 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 PolyGram, which mirrors the Polymarket order book at 0% fees.

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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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 PolyGram 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.