Highest temperature in London on June 11?

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Market context

London's weather on 11 June 2026 will be measured against historical June patterns for the capital, with the highest temperature recorded at City Airport determining the settlement outcome. Early June typically sees London transitioning into warmer conditions, with average highs around 20–22°C, though the range of possible outcomes on any given day remains substantial. The 0% crowd probability suggests traders are either uncertain about the specific temperature bands available or expect conditions to fall outside defined ranges entirely.

Historical June data for London shows considerable variability. The Met Office records indicate that temperatures between 18–25°C are commonplace in early June, whilst extremes above 28°C or below 15°C occur but remain less frequent. The highest June temperature ever recorded in London reached 34.5°C in 2022, though such outliers are rare. Understanding where the market's temperature brackets sit relative to these benchmarks is essential for assessing whether the 0% reading reflects genuine uncertainty or misalignment between available options and expected outcomes.

Traders should monitor the extended forecast as June 2026 approaches, particularly tracking any significant weather systems moving across the Atlantic or developing over continental Europe. The UK Met Office and BBC Weather will provide increasingly precise outlooks in the weeks leading to settlement. Atmospheric pressure patterns and jet stream positioning in early June typically determine whether high-pressure systems deliver warm, settled conditions or whether Atlantic systems bring cooler, wetter weather. Any notable forecast shift towards either extreme should prompt reassessment of the current probability distribution.

Methodology

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

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Today, which mirrors the Polymarket order book at 0% fees. 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?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Today triggers a quick verification flow that finishes in minutes.