Highest temperature in Hong Kong on July 9?

Platform comparison

Market context

Hong Kong is currently experiencing a heatwave with temperatures soaring past 34.6°C, marking the hottest day of the year so far as the city swelters under abnormally high conditions for 2026[3][6]. The Hong Kong Observatory has forecast normal to above-normal temperatures for the July-to-September period, driven by the latest ENSO status and climate model guidance[1]. This seasonal outlook aligns with AccuWeather data showing July daily highs typically ranging from 85°F to 95°F, with an average high of 89°F[2]. Given this historical baseline of extreme heat and the explicit forecast for above-normal temperatures, the current crowd-implied probability of 0% for a specific high-temperature range appears statistically divergent from the analyst consensus on the contract’s likely resolution.

Traders should monitor the finalisation of the “Daily Extract” from the Hong Kong Observatory, which will publish the definitive “Absolute Daily Max” for 9 July 2026 once data is finalized[4]. The settlement window closes at 12:00 UTC on 9 July 2026, meaning the market cannot resolve until the official record is released[5]. Recent reports confirm the observatory recorded a maximum of 36.1°C earlier this week, breaking the 1963 record of 35.5°C and setting 21 consecutive hot nights[3][4]. As the forecast indicates extremely high temperatures between 80°F and 89°F throughout July, any significant divergence between sportsbook lines and the 0% prediction-market probability warrants scrutiny, particularly if the official daily max exceeds the upper bounds of the current temperature range options.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on July 9? 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 Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Best Prediction Markets. 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.

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.

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.