Highest temperature in London on August 19?

Platform comparison

Market context

On 19 August 2026, the highest temperature recorded at London City Airport will determine the resolution of this market. The settlement uses the Daily Observations table from Weather Underground rather than summary figures, meaning intraday peak readings take precedence over rounded day-high estimates. This distinction matters because observation stations can record fractional temperature variations that summary sections may not display with full precision.

August in London typically sees mean daily maxima around 23–24°C, though the range of plausible highs spans considerably wider. Historical data from the Met Office shows that peak August temperatures at London City Airport have reached into the low 30s Celsius during heat waves, whilst cooler years may see maxima in the high teens. The 0% crowd probability suggests traders expect the market's resolution bands to exclude the actual recorded temperature, or that the crowd has not yet engaged with the specific settlement mechanics. Given the precision required in matching Weather Underground's Daily Observations table, traders should verify the exact temperature bands offered before committing capital.

Traders monitoring this market should track the UK Met Office's extended forecast as August 2026 approaches, particularly any heat-wave advisories or unusual pressure systems. The specific reliance on London City Airport's station data—rather than broader London readings—means localised weather patterns matter; airport microclimates can differ from central London by several degrees depending on wind direction and cloud cover. Any revisions to seasonal forecasts or emerging Atlantic weather patterns in summer 2026 will inform the probability distribution across temperature bands.

Methodology

Sports-specific comparison page for Highest temperature in London on August 19?. 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.

FAQ

Are prediction markets better than sports betting?

Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

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.

Can I bet on individual matches?

Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

How fast do sports winnings settle?

Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.