Highest temperature in London on June 7?

Platform comparison

Active sub-markets

Market context

On 7 June 2026, the highest temperature recorded at London City Airport will fall into one of several defined ranges. Traders in this market buy YES or NO shares corresponding to a specific temperature bracket—for instance, a YES share in the "18–20°C" range pays out if that day's peak temperature lands there, whilst a NO share profits if it does not. The settlement will draw from historical weather data logged at the airport's official monitoring station, accessible via Wunderground's archive tool.

London's June temperatures typically cluster between 18°C and 24°C, with extremes rare but not unprecedented. The 0% crowd probability suggests traders currently assign negligible likelihood to whichever range this market represents—possibly an outlier bracket well above or below the seasonal norm. Historical June records at City Airport show peaks occasionally reaching 26–28°C during heat waves, though such days remain infrequent. Seasonal climate patterns and the specific year's atmospheric setup will determine whether conditions favour a cooler or warmer outcome relative to the thirty-year average.

The UK Met Office publishes extended forecasts roughly ten days ahead, with increasing reliability as June 7th approaches. Traders should monitor spring weather patterns through May and early June, as persistent high-pressure systems or Atlantic frontal activity will signal the likely temperature trajectory. Any significant heat-wave warnings issued by meteorological authorities in the weeks prior would shift expectations upward; conversely, unsettled conditions with cloud cover and rain would suppress peak temperatures. The settlement window closes at midday on the day itself, allowing final adjustments once morning forecasts confirm the day's weather direction.

Methodology

This page reviews Highest temperature in London on June 7? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Prediction Market UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

Where can I trade this market with the lowest fees?

On Prediction Market 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.

Is this market available outside the US?

Prediction Market 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Market 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.