Highest temperature in London on June 30?

Platform comparison

Market context

London City Airport is currently experiencing mild conditions with a recorded high of 14°C today, yet the market assigns a zero per cent probability to any temperature range exceeding typical summer highs for 30 June 2026. This stark pricing ignores the historical precedent of the hottest June ever recorded in the UK, where records were broken on 24 June 2026, suggesting that extreme heat events are increasingly plausible in late spring rather than confined to mid-summer peaks[7]. While the all-time record for London stands at 40.2°C observed in July 2022, the specific date of 30 June has historically remained cooler, creating a disconnect between the current zero probability and the recent trend of record-breaking warmth in June[1].

Traders must monitor the Met Office seven-day forecast for London City Airport, which tracks temperature warnings and UV levels as the warm season officially begins on 16 June[6]. The primary catalyst is the potential for a southerly wind shift, which currently sits at eight miles per hour and could rapidly elevate temperatures if sustained, a dependency often cited by beat reporters covering UK weather anomalies[2]. With the settlement window closing at 12:00 UTC on 30 June 2026, any sudden announcement of a heatwave or a significant rise in the "feels like" temperature, currently 13°C, would invalidate the current crowd-implied probability and expose the market to substantial correction[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in London on June 30?. 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

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.

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.