On April 20, 2026, London will be in late spring, when average daily high temperatures typically fall between 12–15°C. This market predicts whether the recorded high will dip to 8°C or below, an outcome that would represent unusually cold weather for that time of year. The threshold of 8°C is well below historical April 20 averages and would only occur if an arctic air mass moved across the UK—a relatively rare event in late spring. The resolution date is fixed, and the outcome is verifiable against the UK Met Office's official records, making this a transparent prediction market. Current odds sit at 0% YES, indicating traders consider it extremely unlikely that London will experience such a cold day. This odds level reflects both historical climate patterns and the season's typical meteorological conditions. Traders may use this market to hedge weather-dependent business outcomes or speculate on seasonal temperature swings. As April 20 approaches, odds could shift if long-range forecasts predict an unusual cold snap or if seasonal patterns diverge significantly from historical norms. The market's simplicity—based on a single, verifiable temperature reading—makes it one of the most straightforward daily weather prediction markets available.