Highest temperature in London on June 22?

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Active sub-markets

Market context

Polymarket is pricing this London City Airport temperature contract at **0% YES** today, which means the current on-chain market on Polygon — settled in USDC through conditional tokens — is effectively saying the listed outcome bands are not being assigned any meaningful chance at the moment. The real-world event is simply the highest temperature recorded at London City Airport on 22 June 2026, with the market resolving from the Wunderground daily history page for EGLC once the day’s data is complete.

That 0% reading is unusually low for a late-June London temperature question, because the city’s warm season normally peaks in midsummer and June already sits inside the period when average daily highs are above 67°F at London City Airport. Comparable Polymarket weather contracts can still move sharply when forecasts firm up, but they often track the day-ahead and same-day guidance rather than the broad seasonal backdrop; here, a live BBC Weather observation for London City Airport already shows 13°C with falling pressure and southerly wind, while the official forecast page from the Met Office has been pointing to much warmer conditions, including a maximum of 30°C for the airport area.

A trader watching this market should focus on the forecast path into the afternoon, because the settlement source is a single station reading rather than a London-wide average. The key dependencies are the Wunderground history update for EGLC, short-range model shifts from the Met Office and BBC Weather, and whether any thunderstorms, cloud cover, or sea-breeze effects cap the day’s peak before the 12:00 UTC settlement window closes; NOAA’s current-time series for EGLC already shows temperatures in the low 20s °C around midday, which leaves room for the final maximum to be set by later-day heating if skies stay open.

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Methodology

This page reviews Highest temperature in London on June 22? 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 Polymarket Scam? — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 Scam?, 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.

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 Scam??

Zero. Polymarket Scam? 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 Scam? 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.