Highest temperature in London on August 12?

Platform comparison

Market context

The market seeks to identify the highest temperature recorded at London City Airport on 12 August 2026, with settlement based on Weather Underground's Daily Observations table rather than summary figures. The resolution source specifies this station's readings in degrees Celsius, establishing a precise measurement point for what would otherwise be a dispersed dataset across London's various weather stations.

August temperatures at London City Airport typically range between 18°C and 26°C, with historical highs occasionally reaching 27–28°C during warm spells. The 0% crowd probability suggests traders are pricing in either exceptionally cool conditions or uncertainty about the resolution mechanics. Comparable August days from recent years show that temperatures above 25°C occur roughly one year in three, whilst readings exceeding 28°C remain relatively uncommon at this specific airport location, which sits closer to the Thames and experiences moderating maritime influence compared to central London.

Traders monitoring this market should track Met Office forecasts released in early August 2026, particularly any heat-wave warnings or high-pressure systems developing over the British Isles in the preceding week. The distinction between Daily Observations and Day High & Low summaries matters operationally—Weather Underground's granular data can occasionally diverge from headline figures depending on recording intervals and station calibration. Any significant weather pattern shifts in late July, such as Azores high-pressure systems moving northward, would be the primary catalyst reshaping probability distributions closer to settlement.

Methodology

Sports-specific comparison page for Highest temperature in London on August 12?. 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.

UK Frequently Asked Questions

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.