Highest temperature in London on June 24?

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Active sub-markets

Market context

The real-world event centres on whether London City Airport will hit a specific high-temperature threshold on 24 June 2026, with the crowd currently pricing a 72% chance of a "YES" outcome. Historical data frames this probability as aggressive; while June 2026 is exceptionally hot with forecasts of 37°C and current humidity at 88%, the all-time London record sits at 40.2°C in July 2022, and late-June peaks of 38°C have only recently broken previous records[7][8]. The consensus leans heavily on the current heatwave persisting, yet the value spot likely sits with the contrarian "NO" bet, as the market may be overreacting to today's 27°C reading and the 37°C forecast without accounting for the statistical rarity of sustained extreme highs in this specific month[1][5].

Traders must monitor the Met Office's hourly updates and the specific timing of the southerly wind shift, which currently drives the humidity and pressure drop that fuels these temperatures[1]. The critical dependency is whether the forecasted 37°C peak materialises before the settlement window closes at 12:00 UTC, as a sudden wind change could cap the temperature below the threshold. Recent Met Office commentary flags 39°C as a headline maximum for Thursday, suggesting the bar for a "YES" resolution is exceptionally high and that the current 72% implied probability may not fully reflect the volatility of late-June weather patterns in Greater London[5][9].

Sources: 1 · 2 · 3 · 4 · 5

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 Who Will Win 2026, 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

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.

What does it cost to trade on Who Will Win 2026?

Zero. Who Will Win 2026 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.