Highest temperature in London on June 1?

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Market context

On 1 June 2026, the highest temperature recorded at London City Airport will fall into one of several defined ranges. The settlement mechanism relies on historical data pulled from Weather Underground's daily archive for that specific station, which sits in East London and typically records temperatures slightly higher than central London due to its location and urban heat characteristics. The 0% crowd probability suggests traders currently see no conviction around any particular temperature band, likely because the event lies eighteen months ahead and seasonal forecasting at that range carries substantial uncertainty.

London's June temperatures have historically clustered between 18°C and 24°C, with occasional peaks above 25°C during warm spells. The Met Office's thirty-year climate averages show mean daily maxima around 20–21°C for early June, though the highest temperatures on individual days can deviate significantly. The 2022 heatwave pushed June readings well above 30°C in parts of southern England, demonstrating that outlier scenarios remain within the realm of possibility, even if they represent tail events. Comparable prediction markets on UK temperature extremes have typically seen liquidity concentrate around the most probable ranges rather than the tails.

Traders monitoring this market should track the UK's winter and spring weather patterns through 2025 and early 2026, as persistent high-pressure systems or Atlantic blocking patterns can signal warmer-than-average conditions heading into summer. The Met Office publishes seasonal outlooks quarterly; their spring 2026 forecast, due in February, will provide the first official guidance on whether June leans warm or cool. Deposit and withdrawal flows on the platform may accelerate closer to the settlement window, particularly if media coverage of unusual weather patterns emerges in May 2026.

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 Polymarket Klarna UK, 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

Is this market available outside the US?

Polymarket Klarna UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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, Polymarket Klarna UK triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.