Highest temperature in London on June 10?

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Market context

The market seeks to identify the highest temperature recorded at London City Airport on 10 June 2026, with settlement determined by historical weather data from Weather Underground. The 0% crowd probability suggests traders currently expect temperatures to fall outside the upper range options available, or that the market structure itself presents pricing anomalies worth examining.

London's June temperatures typically range between 15°C and 22°C, with historical highs occasionally reaching 25–28°C during warm spells. The Met Office's 30-year climate averages show June mean maxima of approximately 20°C across the capital, though individual days frequently exceed this. The 2022 heatwave saw London reach 40°C in July, demonstrating the potential for extreme outliers, whilst more typical June warm days settle around 24–26°C. Traders should reference the UK Climate Projections and recent June performance data from the Met Office's historical records to calibrate expectations against the available temperature bands.

The critical dependency is the Atlantic weather pattern in early June 2026, particularly the position of high-pressure systems and any tropical maritime air masses moving northward. The Met Office issues extended outlooks approximately two weeks before the settlement date; traders should monitor these forecasts alongside European model consensus from mid-May onwards. Historical precedent suggests June temperature forecasting carries substantial uncertainty beyond ten days, making early-month weather pattern shifts the primary catalyst for market movement. Real-time updates from Weather Underground will determine final settlement, making data source verification essential before the 12:00 UTC resolution window closes.

Methodology

This page tracks Highest temperature in London on June 10? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. Election Predictions UK routes every trade through to Polymarket — at 0% fees.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

Where can I trade this market with the lowest fees?

On Election Predictions UK, 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 does it cost to trade on Election Predictions UK?

Zero. Election Predictions UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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, Election Predictions UK triggers a quick verification flow that finishes in minutes.