Highest temperature in London on July 14?

Platform comparison

Market context

On 14 July 2026, the highest temperature recorded at London City Airport will fall into one of several defined ranges, with settlement determined by Wunderground's historical weather data for that specific station. The market currently shows 0% implied probability across all outcomes, suggesting either extreme uncertainty or insufficient liquidity in the USDC-denominated conditional tokens on Polygon. This pricing disconnect often signals an opportunity for traders with conviction on seasonal patterns, though it may equally reflect low trading volume rather than genuine disagreement on likely outcomes.

Mid-July temperatures in London typically range between 20–25°C, with occasional peaks above 27°C during heat waves. Historical records show that temperatures exceeding 30°C at London City Airport remain uncommon for this period, occurring roughly once per decade. The summer of 2022 saw exceptional heat across the UK, with London reaching 40.3°C in early July, though such extremes remain statistical outliers. Understanding the distribution of outcomes requires examining past Julys at this specific station rather than broader London averages, as airport microclimates can differ from city-centre readings.

Traders should monitor the Met Office's medium-range forecasts from early July 2026, particularly any alerts for high-pressure systems or continental air masses moving into the UK. The North Atlantic Oscillation and sea-surface temperatures in the Atlantic influence July weather patterns weeks in advance. Any official heat-health alerts issued by the UK Health Security Agency would signal elevated temperature expectations. Settlement depends entirely on Wunderground's historical records for EGLC station, making data availability and methodology consistency the critical technical dependencies rather than forecast uncertainty alone.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Scam?, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Scam?. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Scam? trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.