Highest temperature in London on June 28?

Platform comparison

Market context

The real-world event is the daily maximum temperature recorded at London City Airport on 28 June 2026, which will determine whether the market settles on a specific Celsius range. Current crowd-implied probability sits at 0% for the “YES” outcome, suggesting traders believe the temperature will fall outside the predicted bracket. This zero probability is unusual for a June heat market, as London typically experiences warm conditions during this period, with average highs often exceeding 20°C.

Historically, June in London has seen temperatures ranging from 15°C to 35°C, with the highest ever recorded in the city reaching 40.2°C in July 2022 at Heathrow and St James’s Park[2]. Recent data from 24 June 2026 shows temperatures hitting 35.1°C in London, prompting an extreme heat warning from the Met Office[6]. For London City Airport specifically, forecasts for 28 June indicate a maximum of 26°C under sunny intervals[1][3]. These comparable cases suggest that a 0% probability may be misaligned with typical June heat patterns, unless the bracket is set unusually high.

Traders should monitor the Met Office’s daily weather updates and Wunderground’s hourly records for London City Airport, as these are the official resolution sources[1][4]. Any sudden shifts in cloud cover, wind direction, or humidity could alter the peak temperature. The Met Office has already issued an extended red extreme heat warning, indicating that heat conditions are active and evolving[6]. A trader should watch for real-time temperature spikes before the settlement window closes at 12:00 UTC on 28 June, as these could move the market significantly.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Highest temperature in London on June 28?. 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

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.

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.