Highest temperature in London on August 17?

Platform comparison

Market context

The Met Office records daily maximum temperatures across the UK using standardised observation protocols. On 17 August 2026, London City Airport will record its highest temperature during daylight hours, with settlement determined by the Daily Observations table on Weather Underground rather than summary figures. The current 0% implied probability suggests traders expect temperatures to fall outside the upper range bracket specified in the market's resolution criteria.

August temperatures in London typically range between 20–25°C, with historical highs occasionally reaching 28–30°C during heat waves. The 2022 heatwave saw London record 40.3°C, though such extremes remain statistically rare. Recent summers have shown increasing volatility; August 2023 peaked at 27.5°C whilst August 2024 remained closer to seasonal norms around 23°C. These precedents indicate that whilst extreme heat is possible, the probability of any given August day reaching exceptional temperatures remains modest unless specific atmospheric conditions develop.

Traders should monitor long-range weather forecasts released in early August 2026, particularly any alerts from the Met Office regarding high-pressure systems or continental air masses moving into the UK. The North Atlantic Oscillation and sea surface temperatures in the Atlantic will influence whether warm air reaches London during mid-August. Any official heat-health alerts issued by the UK Health Security Agency would signal elevated temperatures, though such warnings typically accompany readings above 30°C. Real-time observation data from Weather Underground becomes the decisive factor once 17 August arrives, with the Daily Observations table providing granular hourly readings that determine final settlement.

Methodology

Sports-specific comparison page for Highest temperature in London on August 17?. 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.

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.