Highest temperature in London on June 10?

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Market context

This market settles on the highest temperature recorded at London City Airport on 10 June 2026, measured in degrees Celsius and resolved via Weather Underground historical data.

London's June temperatures typically range between 15°C and 22°C, with daily highs rarely exceeding 25°C during early summer. Historical records from the Met Office show that temperatures above 28°C occur in fewer than 5% of June days across the capital, whilst readings above 30°C are exceptionally rare before late June. The 0% crowd probability suggests traders are pricing in an expectation that the settlement range—likely spanning intervals such as 20–25°C or 25–30°C—will capture the day's actual high. This reflects baseline seasonal patterns rather than any forecast anomaly.

The critical dependency is the weather forecast issued by the UK Met Office in the days immediately preceding 10 June 2026. Heatwaves affecting the British Isles typically develop when high-pressure systems establish over continental Europe, drawing warm air northward; such patterns are usually identifiable 7–10 days in advance. Traders should monitor Met Office long-range outlooks and any official heat-health alerts issued by the UK Health Security Agency, which typically activate when temperatures are forecast to exceed seasonal norms significantly. The settlement window closes at midday on 10 June, meaning the final temperature reading will reflect conditions recorded up to that point.

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in London on June 10? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

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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.

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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.