Highest temperature in London on June 22?

Platform comparison

Active sub-markets

Market context

At London City Airport, the key question is whether the day’s top reading lands in the high-20s Celsius or stops one band lower, because the market is settled on the highest temperature recorded by 12:00 UTC on 22 June. Current pricing is concentrated on **27°C** with **28°C** as the main alternative, which is consistent with a warm spell but not a clear break into more extreme heat.[1]

For context, short-dated temperature markets tend to track the forecast distribution more than the eventual afternoon maximum once the settlement cut-off is close. Here, the crowd-implied **0% YES** looks more like a product of the specific strike structure and timing than a view that warmth is impossible: London City Airport can still post its daily maximum before midday if early cloud breaks and sunshine accelerates warming, but any afternoon heat after 12:00 UTC will not count.[1][3][5]

From a market-access angle, the regulatory lens matters as much as the forecast. Under Germany’s **GlüStV**, online wagering-style products can face licensing and geo-restrictions, so German users often encounter tighter access than those in lighter-touch jurisdictions; in the US, the **CFTC** can assert broad reach over event-based derivatives if a platform falls within its remit. For a venue advertising **no-KYC up to $1,500**, that usually means smaller balances may be opened with limited identity checks, but access for this particular market can still depend on jurisdiction screening, payment rails, and any country-specific blocks rather than the headline threshold alone.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Is this market available outside the US?

Polymarket KYC 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'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 Polymarket KYC UK?

Zero. Polymarket KYC 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.