Highest temperature in London on June 9?

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Market context

London's highest temperature on 9 June 2026 will be measured at City Airport Station and resolved against historical weather data from Wunderground. The settlement window closes at noon UTC on that date, meaning traders must account for morning readings and any afternoon heat that occurs before the data snapshot. City Airport sits in East London near the Thames, typically recording temperatures 1–2°C cooler than central London due to its riverside location and exposure to maritime air masses.

June temperatures in London historically cluster between 18–24°C for daily highs, though the 9th carries no particular meteorological significance that would push readings toward extremes. The 0% crowd probability suggests either low trader engagement or genuine uncertainty about which temperature band will resolve. For programmatic approaches, the key dependency is Wunderground's historical data feed; traders building conditional orders should verify the station's reporting schedule, as gaps in hourly data occasionally occur during system maintenance. The Met Office publishes extended forecasts roughly ten days ahead, providing the earliest reliable signal for late-May conditions that influence early-June patterns.

Traders monitoring this market should track the North Atlantic Oscillation index and jet stream positioning in late May, as these drive whether high-pressure systems deliver warm continental air or Atlantic lows bring cooler, unsettled conditions. Recent precedent: June 2022 saw London reach 28°C on the 17th during an exceptional heatwave, but such events remain statistically rare for early June. The market's current state reflects genuine forecast difficulty rather than mispricing, given the five-month lead time and inherent variability of English summer weather.

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 Bot UK, which mirrors the Polymarket order book directly.

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

Is this market available outside the US?

Polymarket Bot 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 does it cost to trade on Polymarket Bot UK?

Zero. Polymarket Bot 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.

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.