Highest temperature in London on July 20?

Platform comparison

Market context

London City Airport recorded a peak of 13°C on 20 July 2026, confirming the crowd-implied 0% probability for any higher temperature outcome. This result aligns with typical mid-summer conditions for the capital, where July highs usually range between 18°C and 24°C, though cooler, cloudier days are frequent when Atlantic systems dominate. Historical data from the last decade shows that temperatures exceeding 30°C occur only in about 15% of July days, while readings below 15°C are common during periods of persistent rain or low cloud cover, as seen in 2020 and 2023.

Traders should monitor the Met Office’s daily weather summaries and Wunderground’s hourly archives for the EGLC station, as these are the definitive sources for settlement. The key dependency is the timing of the temperature peak, which often occurs between 14:00 and 16:00 BST; any deviation due to sudden cloud cover or wind shifts can suppress the maximum. Recent forecasts from the BBC indicate a southerly flow with 88% humidity and falling pressure, conditions that typically limit solar heating and keep daytime highs modest. No major coaching changes or team absences apply here, but atmospheric dependencies remain the primary catalyst for price movement in similar weather markets.

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Methodology

Sports-specific comparison page for Highest temperature in London on July 20?. 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.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

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.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.