Highest temperature in London on June 30?

Platform comparison

Market context

London is currently experiencing a sharp drop in temperature, with London City Airport recording just 13°C at 10:00 BST on Tuesday 30 June, accompanied by light rain and high humidity of 88%[2][3]. This unseasonable coolness, coupled with falling pressure at 1012mb, suggests the atmosphere is far from the conditions needed to generate a record high temperature for the month[2]. The crowd-implied probability of 0% for a "YES" outcome reflects this immediate reality, as the day has already passed its peak thermal window without approaching the thresholds required for the market to resolve positively.

Historically, late June in London often marks the start of the warm season, which typically runs from mid-June to early September with average daily highs exceeding 20°C[5]. However, recent anomalies show that heatwaves are not guaranteed; for instance, while London reached 35.1°C on 24 June under an extreme heat warning, such spikes are volatile and dependent on specific high-pressure systems[7]. The current 0% probability aligns with comparable cases where unsettled post-May conditions, similar to those forecast for 6 June 2026 with a mere 17°C maximum, prevent temperatures from climbing significantly[1]. Traders should watch for sudden Met Office announcements regarding pressure shifts or wind direction changes, as these are the primary catalysts that could alter the final resolution, though current data points to a definitive cool finish[6]. No injuries or suspensions apply here, but the weather line-up is firmly set against heat.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-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 (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.

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.

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.