Highest temperature in London on June 26?

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Market context

London City Airport is forecast to reach a maximum daytime temperature of 26°C on 26 June 2026, under settled conditions with southerly winds and moderate humidity[2][6]. This specific reading aligns with the Met Office’s official update issued at 6am today, which cites a 26°C peak as the most probable outcome for the station[6]. The current crowd-implied probability of 0% for any higher range reflects the market’s confidence that temperatures will not breach this ceiling, given the lack of extreme heat drivers in the immediate forecast.

Historically, early June in London rarely exceeds 26°C at this station, with the warm season typically beginning only from 16 June onward and averaging highs above 67°F (24.4°C) thereafter[4]. While Heathrow recorded a record 33.9°C in June 2023—the hottest June day since 1976—such extremes are outliers tied to specific atmospheric setups not present in the current forecast[7]. The 26°C projection for EGLC on 26 June 2026 sits firmly within the normal range for late June, making the 0% probability for higher ranges a rational assessment based on comparable cases.

Traders should monitor the Met Office’s hourly updates and Wunderground’s live data stream for any deviation from the 26°C forecast, as sudden shifts in wind direction or pressure could alter the outcome[2][3]. The primary catalyst is the Met Office’s 6am daily forecast, which has consistently anchored expectations at 26°C for this date[6]. No scheduled political debates or campaign-finance disclosures are expected to influence weather patterns, confirming that the market is leaning solely on meteorological data rather than external events. The resolution source remains Wunderground, which will publish the definitive highest temperature once the first data point for 26 June is available[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in London on June 26? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. Trump Prediction routes every trade through to Polymarket — at 0% fees.

Resolution & payout

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FAQ

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