London's weather on April 20 will be shaped by atmospheric conditions that meteorologists track and traders monitor closely. This market question focuses on a specific temperature outcome: whether London's highest temperature will reach exactly 11°C. Such precision in weather markets adds complexity and reduces the probability of any single exact outcome. Current market prices reflect a 1% probability for this result, indicating that traders view this specific temperature as statistically unlikely compared to other possible ranges. Weather prediction is inherently uncertain—meteorological forecasts produce temperature ranges rather than exact values, and variation across measurement stations can occur. The market resolves using official data from the UK Met Office or standard London weather station measurements, providing objective resolution criteria. The 1% odds suggest market participants believe warmer or cooler temperatures are considerably more probable for April 20 in London. As the resolution date approaches, traders will monitor updated weather forecasts and real-time temperature observations to refine their positions. The market closes at midnight UTC on April 20, providing a final 24-hour trading window for participants to adjust exposure based on the latest meteorological data and intraday observations.