Highest temperature in London on July 9?

Platform comparison

Market context

On 9 July 2026, the London City Airport Station will record its peak temperature for the day, a single data point that determines whether the market resolves to the highest temperature range. The current crowd-implied probability of 0% for a “YES” outcome suggests traders believe the day will not breach the threshold defining the top range, likely due to expectations of moderate summer conditions rather than an extreme heat spike.

Historically, July in London averages 23°C (73°F), but heatwaves frequently push temperatures above 30°C, with the Met Office recording a record 40.2°C at Heathrow in July 2022[7]. While London City Airport typically sees highs between 18°C and 25°C, recent trends indicate 2026 is likely to experience at least one sustained scorcher exceeding 30°C[7]. The 0% probability may reflect a misreading of this volatility, as even a single hot day could shift the outcome if the threshold is near 30°C.

Traders should monitor the Met Office’s daily forecasts for London City Airport, which currently predict a high of 33°C for Thursday[4], and watch for any sudden shifts in weather patterns before the settlement window closes. The Wunderground data source will confirm the exact peak, so real-time updates from the National Weather Service for EGLC are critical[8]. Any announcement of a heatwave or cloud cover change could dramatically alter the implied probability, making short-term weather bulletins the key catalyst.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Highest temperature in London on July 9?. 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 (US-focused) or Manifold (play-money).

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

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.

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.