Highest temperature in London on June 8?

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Active sub-markets

Market context

On 8 June 2026, the highest temperature recorded at London City Airport will fall into one of several defined ranges. This market resolves based on historical weather data logged by Weather Underground, with settlement occurring at midday on the resolution date. The measurement captures the peak daily temperature across all hours, providing a single factual reference point that eliminates ambiguity around timing or station variance.

London's June temperatures typically cluster between 18–23°C, though extremes have occurred. The Met Office records show that June highs in central London have reached 28°C in recent decades, with the exceptional 2022 heatwave pushing readings toward 32°C. For comparative context, the 0% crowd probability suggests traders are either confident in moderate conditions or uncertain enough to avoid commitment. Historical volatility in early summer forecasts—where a single Atlantic system can shift expected highs by 5–8°C—explains why long-dated temperature markets often show compressed pricing until the final week.

Traders monitoring this market should track the UK Met Office extended outlook and European model consensus (ECMWF) from late May onward. Jet stream positioning and any developing high-pressure systems over the continent become material around 72 hours before settlement. Weather Underground's historical data feed updates automatically, making this market suitable for conditional order logic: a trader could programme alerts tied to forecast thresholds or automate position adjustments as model runs converge. The London City Airport station location—positioned near the Thames estuary—means maritime influence may suppress extremes compared to inland readings.

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 App 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

Is this market available outside the US?

Polymarket App 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 App 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.