Highest temperature in Hong Kong on July 4?

Platform comparison

Market context

The real-world event hinges on whether Hong Kong Observatory records a daily maximum temperature exceeding 30°C on 4 July 2026, a threshold that currently carries zero crowd-implied probability of being met. Historical data frames this improbability: July in Hong Kong typically sees average highs around 31–32°C, with the warmest day in recent records reaching 30.1°C[3][5]. The 0% YES probability likely reflects a misreading of current conditions—today’s forecast shows only 16–20°C with cloudy skies and light rain[7], an anomaly that may have skewed short-term sentiment despite seasonal norms pointing to above-normal temperatures for July–September 2026[1][2].

Traders should monitor the Hong Kong Observatory’s seasonal updates and typhoon forecasts, as the city expects 4–7 typhoons between June and October, which could suppress peak temperatures[1]. A key catalyst is the finalisation of the “Daily Extract” data for 4 July, which will confirm the absolute daily maximum to one decimal place[2]. Recent reports from the South China Morning Post highlight that 2026 may be among the warmest top 10 years on record, suggesting the current 0% probability may be premature[1]. Regulatory accessibility remains a factor: under German GlüStV and US CFTC rules, platforms offering “no-KYC up to $1,500” allow broader participation for this market, though compliance obligations persist for larger trades.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in Hong Kong on July 4? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.

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FAQ

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