Highest temperature in London on June 10?

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Market context

The settlement hinges on the single highest temperature reading at London City Airport on 10 June 2026, measured in Celsius and resolved via Wunderground historical data. The 0% crowd probability suggests traders are either uncertain about the specific temperature range offered or have not yet engaged with this particular contract. Temperature forecasting at this distance carries inherent uncertainty; June typically sees London highs between 18–23°C, though extremes occasionally breach 25°C during early-summer heat waves.

Historical June data from the Met Office shows London City Airport rarely records temperatures above 26°C in early June, with the station's June average high around 20°C. The 2022 heatwave pushed readings to 32°C in mid-June, but such events remain statistical outliers. Current long-range weather models for early June 2026 are not yet reliable enough to inform meaningful odds divergence between prediction markets and meteorological consensus, though seasonal patterns and climate normals provide a baseline for calibration.

Traders should monitor the UK Met Office's extended outlook as June 2026 approaches, particularly any signals of Atlantic blocking patterns or continental air masses that could drive anomalous warmth. The settlement window closes at noon UTC on the day itself, meaning real-time weather developments in the 24 hours prior will be critical. No major scheduled events or policy announcements directly influence this outcome; resolution depends entirely on instrumental measurement at a single airport weather station.

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 Best Prediction Markets UK, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

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 it cost to trade on Best Prediction Markets UK?

Zero. Best Prediction Markets 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, Best Prediction Markets 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.