Highest temperature in London on June 14?

Platform comparison

Active sub-markets

Market context

On 14 June 2026, the highest temperature recorded at London City Airport will fall into one of several defined ranges. The settlement hinges on data from Wunderground's historical weather archive for that specific station, with the resolution window closing at midday UTC. This is a straightforward weather outcome market with no discretionary elements—the thermometer reading is the only variable.

London's June temperatures have historically clustered between 18°C and 24°C, with occasional peaks above 25°C during warm spells. The 0% crowd probability suggests traders are either uncertain about the market mechanics or awaiting clearer range definitions before committing capital. Comparable June days at City Airport over the past decade show that temperatures above 28°C occur roughly once every three to four years, making extreme heat scenarios statistically uncommon but not unprecedented. The current probability distribution likely reflects baseline seasonal expectations rather than any specific forecast signal.

The UK Met Office will publish its extended outlook for mid-June 2026 in late May, providing the first substantive catalyst for position adjustments. Traders should monitor Atlantic pressure patterns and jet stream positioning from early June onwards, as these drive whether continental warm air reaches the southeast. Deposit friction via Klarna or SEPA transfers may suppress early liquidity, but once funding clears and range options become visible on-platform, book depth typically follows. The settlement date is fixed and non-negotiable, eliminating extension risk that sometimes clouds weather markets.

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 Klarna 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

Where can I trade this market with the lowest fees?

On Polymarket Klarna UK, 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'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.

Do I need to KYC for this market?

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