Highest temperature in London on August 10?

Platform comparison

Market context

London’s temperature at London City Airport is the deciding figure here, and the market is about the single highest reading recorded in Weather Underground’s Daily Observations table before the settlement cut-off, not the summary high/low box. With the crowd currently pricing **0% YES**, the market is effectively saying the specified temperature band is seen as impossible or so unlikely that no one is willing to pay for it at present, which is a strong signal only if the day remains far from the relevant threshold. Weather Underground’s resolution method matters because a late-afternoon spike or a brief airport reading can settle this differently from a broader “London” forecast.

The historical frame is straightforward: London’s August extremes can still produce sharp upside surprises, but they are uncommon. London’s all-time August record is 38.1C at Kew Gardens and Heathrow on 10 August 2003, while Heathrow reached 36.4C during a later August hot spell in 2020.[3][7][10] For a narrower airport-based market, that means traders should focus less on citywide averages and more on whether a short-lived convective burst, sunshine break, or warm easterly flow can push London City Airport into a higher band than the main forecast has discounted.[8][11]

The main catalysts are the day’s local forecast updates, any late changes in cloud cover or shower timing, and whether the airport station logs its peak before the settlement window closes at 12:00 UTC. AccuWeather’s London forecast showed an **81F/61F** split for 10 August, which is broadly consistent with a warm but not extreme profile, though that does not directly determine the settlement reading.[1] Traders will also watch whether the observed high lands above or below the nearby 26C–27C area implied by the market’s own reference pricing, since a small deviation around that zone can shift the outcome band materially.[5]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in London on August 10?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

UK Frequently Asked Questions

Are prediction markets better than sports betting?

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When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

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Do I pay tax on prediction market profits in the UK?

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