Highest temperature in London on June 12?

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Market context

London's weather on 12 June 2026 will be recorded at City Airport, with the settlement hinging on whatever peak temperature the station logs that day. The current zero probability assigned suggests traders are either absent from this market or genuinely uncertain about which temperature band will ultimately verify. Settlement depends entirely on Wunderground's historical data feed for that specific station and date, making the resolution mechanism straightforward once the day passes.

June temperatures at London City Airport typically range between 18–23°C, though the airport's urban location near the Thames can produce microclimatic variations. Historical June records show occasional peaks near 25–26°C during warmer years, whilst cooler spells can see maxima drop to 16–17°C. The 0% probability across all ranges suggests the market may be thinly traded or that traders are waiting for seasonal forecasts to narrow expectations before committing positions.

The relevant catalyst is the arrival of medium-range weather forecasts in early June 2026, which will provide 10–14 day outlooks from the Met Office and other services. High-pressure systems moving across the UK or Atlantic weather fronts will be the primary drivers of temperature variance that week. Traders should monitor whether any heat domes or unsettled patterns develop in the fortnight leading to settlement, as these will sharpen predictions around which temperature band becomes most probable.

Methodology

This page reviews Highest temperature in London on June 12? 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 Prediction Today — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Today, 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.

Is this market available outside the US?

Prediction Today 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.

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.