Highest temperature in London on July 14?

Platform comparison

Market context

The UK Met Office records daily maximum temperatures across its network of weather stations, with London City Airport serving as the official observation point for central London. On 14 July 2026, the highest temperature recorded at this station will determine the settlement outcome, with ranges typically spanning 15–30°C depending on seasonal patterns and anomalies. The current crowd-implied probability of 0% suggests traders are not yet confident in any specific temperature bracket, reflecting the distance between now and the settlement window.

Historical July temperatures in London show considerable variability. Between 2015 and 2024, maximum temperatures on mid-July dates ranged from 18°C to 32°C, with an average around 24–25°C. The exceptional heat of July 2022, when the UK experienced temperatures exceeding 40°C, remains an outlier rather than a trend; more typical mid-summer days see highs in the low-to-mid twenties. This historical spread explains why prediction markets have not yet concentrated probability mass on any single range.

Traders monitoring this contract should track the Met Office's seasonal forecasts and European weather pattern indices as spring 2026 approaches. Atmospheric circulation patterns—particularly the position of the jet stream and any high-pressure systems over the North Atlantic—will become clearer 4–6 weeks before the settlement date. Near-term climate oscillations, including the Atlantic Multidecadal Oscillation and solar activity cycles, remain too distant to forecast with precision at this stage. The settlement relies exclusively on Wunderground's historical data feed from London City Airport Station, making real-time verification straightforward once the date arrives.

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 Best Prediction Markets, 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 Best Prediction Markets. 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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

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