Highest temperature in London on August 3?

Platform comparison

Market context

London’s midday-to-afternoon heat on 3 August will be decided by how far temperatures at London City Airport climb before the settlement window closes, and the market’s 0% YES implication looks disconnected from the sort of late-summer warmth London can still deliver when high pressure settles in. The Met Office said UK daily maximum temperatures in summer 2026 have been running above average, even if they are not all pushing into record territory, while a BBC report this summer noted southern England could still see low-30s Celsius in hot spells. [14][15]

For context, London’s August climate sits around the high teens to low 20s Celsius on average, but the city has repeatedly produced low-30s readings in warm years, so the meaningful question is less whether London can be hot and more whether today’s setup supports a short-lived spike. Polymarket’s own market page points to forecasts clustering around 30–31°C, with 30°C and 31°C the leading outcomes, which is consistent with a market expecting warmth but not extreme heat. [2][8]

The main catalysts for traders are the final cloud cover, wind direction and any late-day forecast updates for south-east England, because a slightly cooler marine influence can cap the airport station below the next temperature band. The key dependency is the published Wunderground history entry for London City Airport, since the market resolves on the highest recorded temperature there for the day, not a citywide average, so a brief afternoon peak matters more than the morning or evening profile. [2][1]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in London on August 3?. 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

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.

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.