Weather prediction markets track daily temperature extremes in major cities, providing objective forecasts and tradeable instruments for those interested in weather outcomes. This market focuses on London's highest temperature on April 20, 2026, asking whether the daily maximum will be exactly 12°C. London's April weather typically ranges from 8°C to 15°C, making a 12°C high sit near the seasonal midpoint for this time of year. The 7% YES odds indicate that traders currently assess this specific outcome as unlikely, suggesting broader market expectations lean toward either warmer or cooler conditions on that date. As is typical with weather markets, forecasts become increasingly reliable as the event date approaches, giving market participants the opportunity to adjust their positions based on updated meteorological data from official sources. Market resolution uses UK Met Office official temperature readings, ensuring outcomes are objectively verifiable and deterministic. The $2,647 in 24-hour trading volume and $3,558 available liquidity demonstrate active participation in London's daily temperature predictions. As April 20 draws closer, market odds typically converge toward the most likely weather forecast, though unexpected weather systems can create significant price movements in either direction before the market closes.