Highest temperature in London on June 14?

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Market context

On 14 June 2026, the highest temperature recorded at London City Airport will fall into one of several defined ranges. The market currently shows 0% probability across all temperature brackets, suggesting either insufficient liquidity or genuine uncertainty about which range will settle. Traders are pricing conditional tokens on Polygon, with USDC collateral, against Wunderground's historical data feed for that specific station—a relatively granular weather measurement point in East London rather than a broader city average.

London's June temperatures typically range between 18–24°C, though heat waves can push readings considerably higher. The summer of 2022 saw unprecedented temperatures across the UK, with some southern stations recording 40°C+, but such extremes remain statistical outliers. June specifically tends toward moderate warmth; the last decade's June highs at comparable London stations have clustered in the 25–28°C band, with occasional spikes to 30°C during particularly warm years. This historical distribution should anchor expectations about which temperature brackets carry genuine probability mass.

The Met Office publishes seasonal outlooks and monthly forecasts that traders should monitor as June 2026 approaches; any indication of an Atlantic ridge or heat dome developing over the UK would shift probability toward higher ranges. Additionally, the specific microclimate at City Airport—positioned near the Thames with urban heat-island effects—differs from central London readings, making historical comparisons to well-known weather events potentially misleading. Real-time weather models become actionable only within two weeks of the settlement date, so early trading reflects prior-year patterns rather than predictive meteorology.

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 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

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, Polymarket 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.