Highest temperature in London on June 7?

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Market context

On 7 June 2026, the highest temperature recorded at London City Airport Station will fall into one of several defined ranges. The settlement will draw from Wunderground's historical weather database, which logs daily highs across all recorded times at that specific location. The 0% crowd probability suggests traders currently expect no outcome will occur—a statistical impossibility for a weather event, indicating either minimal market participation or a technical issue with how the market is displaying available ranges.

London's June temperatures have historically ranged between 18°C and 28°C, with average highs around 22–23°C. The 30-year climate normal for early June shows extremes are rare; temperatures above 25°C occur roughly one year in three, whilst readings above 30°C at City Airport remain uncommon. The 2022 heatwave pushed London to 40.3°C in July, but June typically remains considerably cooler. Comparable prediction markets on UK summer temperatures have resolved across the full spectrum of offered ranges, reflecting genuine uncertainty rather than clustering at extremes.

From a regulatory standpoint, this market's accessibility depends on jurisdiction and operator licensing. Under German GlüStV rules, prediction markets require explicit state approval; most UK-based platforms operate under Gambling Commission oversight rather than financial regulation. US CFTC reach extends to derivatives on physical commodities including weather, though retail access varies by state. Many platforms offer no-KYC trading up to $1,500 notional exposure per user, though this threshold does not exempt operators from reporting obligations or anti-money-laundering requirements. Traders should verify their platform's specific regulatory status before participation.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

Is this market available outside the US?

Polymarket Legal 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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Legal 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.