Highest temperature in London on July 15?

Platform comparison

Market context

London City Airport will record its peak temperature for 15 July 2026, the single data point determining settlement for this weather market. The current crowd-implied probability of 0% for a "YES" outcome is technically a misreading of the market structure, as the event is binary only within the context of a specific range selection; the frontrunner outcome is actually 28°C at 57% probability, with 27°C trailing at 22% [1]. This distribution suggests traders are pricing in a hot but not extreme summer day, consistent with London’s typical mid-July thermal profile where temperatures frequently hover between 25°C and 30°C.

Historical extremes provide a crucial boundary for this probability assessment. The all-time highest temperature recorded in London is 40.2°C, observed at Heathrow and St James’s Park on 19 July 2022, a record that remains unbroken [3]. However, London City Airport (EGLC), situated closer to the river and urban core, often registers slightly different readings than Heathrow due to its specific microclimate and exposure. The current market pricing of 28°C aligns with recent comparable years rather than the 2022 anomaly, indicating the market views a record-breaking heatwave as highly unlikely for this specific date.

Traders should monitor the Met Office’s daily forecast updates and real-time Wunderground data for EGLC as the settlement window approaches [1]. The primary catalyst is the arrival of any southerly airflow, which currently shows 8 mph winds at the airport with 88% humidity, a condition that typically suppresses peak temperatures unless a high-pressure ridge intensifies [2]. Any sudden shift in the jet stream or the deployment of a "heat dome" over the UK would be the definitive signal to adjust positions, as these atmospheric dependencies directly dictate whether the temperature breaches the 28°C threshold.

Sources: 1 · 2 · 3

Methodology

Football-specific comparison page for Highest temperature in London on July 15?. 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

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.

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.

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.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.