Highest temperature in London on August 10?

Platform comparison

Market context

A temperature market on London City Airport will settle against the **highest reading in Weather Underground’s Daily Observations table**, so the relevant event is not “what did London feel like?” but whether the station posts a daily maximum that lands in the quoted range. Current pricing at 0% YES implies the crowd sees that band as effectively impossible, which is unusual given that short-range summer forecasts for London still allow materially different highs from one day to the next. AccuWeather’s August outlook for London spans a wide range of daily highs, underscoring that the distribution of possible outcomes is broader than a single point estimate.[1]

For historical context, August 10 has form as a date associated with notable UK heat, including the 38.5°C national August record set on 10 August 2003, and 38.1°C at Kew Gardens and 37.9°C at Heathrow on the same day.[4][11][14] London itself has also produced high-30s readings in severe heat events, including Heathrow reaching 36.4°C in August 2020.[6] That does not make a very hot outcome likely every year, but it explains why markets like this can reprice sharply if a persistent warm spell develops. The 0% YES level therefore reads more like a statement that the market currently sees the target range as outside the near-term forecast envelope than as a claim that the station cannot reach it.[5]

Traders should watch the UK Met Office and commercial forecast updates for any shift in the synoptic setup, especially if a continental ridge builds over southern England, because the market’s range depends on the single daily maximum at one station rather than a citywide average.[1][5] Settlement is based on Weather Underground’s London City Airport history page, and revisions are counted until the next day’s first datapoint appears, so late updates can matter if a reading is corrected.[5] In accessibility terms, “no-KYC up to $1,500” means a user can usually interact without identity verification until cumulative activity or balance crosses that threshold; above it, verification is typically required, which can affect participation in this market depending on local rules. German GlüStV restrictions may limit access from Germany, while the US CFTC’s broad reach means US-facing participation is also constrained by derivatives and betting enforcement risk rather than the weather nature of the event itself.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of Highest temperature in London on August 10? 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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