Highest temperature in London on June 14?

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Market context

On 14 June 2026, the highest temperature recorded at London City Airport Station will fall into one of several defined ranges. The settlement will draw from Wunderground's historical weather database for that specific location and date, with the resolution window closing at 12:00 UTC. London City Airport sits in the Isle of Dogs, east of central London, and its microclimate can differ notably from readings taken elsewhere in the capital due to proximity to the Thames and urban heat dynamics.

June temperatures in London typically range between 15°C and 22°C, though extremes above 25°C occur roughly once every three to four years during early summer. The 0% crowd probability suggests traders are either uncertain about which range will resolve or are waiting for seasonal forecasts to narrow expectations. Historical June records for the city show that temperatures exceeding 28°C remain uncommon but not unprecedented; the Met Office data from comparable periods indicates that anomalously warm spells tend to cluster around specific synoptic patterns—namely, sustained high pressure over the British Isles or warm air advection from continental Europe.

From a regulatory standpoint, this market operates under frameworks that vary by trader jurisdiction. The German GlüStV treats prediction markets as wagering products subject to licensing; US CFTC oversight applies to US-domiciled traders, though binary weather derivatives fall into a grey zone absent explicit exemption. For traders in most EU and UK jurisdictions, no-KYC access up to £1,200 (approximately $1,500) means casual participation remains accessible without identity verification, though larger positions trigger standard anti-money-laundering requirements. Settlement depends entirely on Wunderground's historical data feed; traders should verify the source URL remains active and that London City Airport Station continues reporting to that service through June 2026.

Methodology

This page reviews Highest temperature in London on June 14? 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 Legal UK — 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

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.

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.

Do I need to KYC for this market?

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