London's weather on April 20, 2026 will be resolved based on the highest temperature recorded by the UK Met Office. A maximum of exactly 17°C represents a cool spring day for London, where April typically sees highs between 13-16°C. At just 1% YES odds, traders assess this outcome as highly unlikely—most market participants expect London to be either warmer or cooler on that date. The prediction market reflects April weather patterns, where 17°C sits at the lower end of typical spring temperatures but remains within the realm of possibility. Resolution will depend on official Met Office data for the 24-hour period ending at midnight UTC on April 20. The current pricing suggests strong consensus that London will either exceed 17°C or fall short of it. This daily temperature market is part of a recurring series tracking weather outcomes across major cities, allowing traders to speculate on precise meteorological conditions. The extremely low YES odds indicate that hitting an exact temperature of 17°C—rather than 16°C, 18°C, or any other value—is viewed as statistically improbable by the market.