Highest temperature in London on June 8?

Platform comparison

Active sub-markets

Market context

On 8 June 2026, the highest temperature recorded at London City Airport Station will determine which range this market resolves to. The Met Office and Weather Underground maintain continuous records at this location, situated in East London's Docklands, making it a reliable reference point for intraday temperature extremes. Current crowd pricing at 0% YES reflects either extreme confidence in a particular outcome or insufficient liquidity to establish meaningful odds across the available ranges.

London's June temperatures typically peak between 20–24°C, though the city has recorded highs exceeding 30°C during heatwaves. The 2022 June heatwave saw temperatures reach 28°C in central London; the 2003 European heat event pushed readings above 30°C. Historical volatility in early summer weather patterns—driven by Atlantic pressure systems, continental air masses, and occasional tropical moisture—means the spread between likely and outlier scenarios remains material. Comparable June days at City Airport show clustering around 21–23°C, with rare excursions into the upper 20s.

From a regulatory standpoint, this weather derivative sits outside traditional financial derivatives frameworks in most jurisdictions. The German GlüStV (gambling licensing authority) does not typically classify meteorological prediction markets as gaming products when settlement is objective and verifiable. US CFTC oversight applies only to contracts on regulated commodities or financial instruments; weather itself falls outside this scope. For traders in the UK, no KYC requirement applies to positions under £1,500 notional value on most platforms, though settlement verification against Weather Underground's historical database remains mandatory regardless of account tier. The settlement window closes at 12:00 UTC on 8 June, after which no further trades execute.

Methodology

We track Highest temperature in London on June 8? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Tax 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?

Polymarket Tax 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.

What does it cost to trade on Polymarket Tax UK?

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

Do I need to KYC for this market?

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