Highest temperature in Hong Kong on July 8?

Platform comparison

Market context

The real-world event at hand is the daily maximum temperature recorded by the Hong Kong Observatory on 8 July 2026, measured in degrees Celsius to one decimal place. Current crowd-implied probability for a specific outcome sits at 0% YES, yet multi-model consensus and recent Observatory guidance point to daytime maxima of 30–31°C for the preceding day, with July 2026 forecasts showing daily highs between 86°F and 94°F (roughly 30–34°C)[1][4]. Historical data confirms a significant long-term increasing trend in Hong Kong’s summer temperatures, with the chance of normal to above-normal conditions generally higher for July–September 2026[3]. The average July high is 88°F (31.1°C), and July 2018 saw a mean maximum of 31.8°C, framing the current 0% probability as potentially misaligned with seasonal norms[5].

Traders should monitor the Hong Kong Observatory’s finalised “Daily Extract” for the specified date, as the market cannot resolve until this official data is published[5]. Key catalysts include the latest ENSO status updates and climate model revisions, which the Observatory cites as critical for temperature forecasts[3]. Recent outlooks from late June predict very hot daytime conditions with possible unsettled weather on Friday, which could influence cloud cover and peak temperatures[7]. While prediction markets show a 0% implied probability for certain ranges, sportsbook lines on comparable temperature contracts often diverge, reflecting analyst consensus that above-normal highs are likely[3]. The settlement window ends 2026-07-08T12:00:00Z, so timely access to the Observatory’s absolute daily max is essential for accurate odds comparison across platforms.

Sources: 1 · 2 · 3 · 4 · 5

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 Best Prediction Markets 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

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 UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

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.