Busan, South Korea's second-largest city and a major international port, has a temperate maritime climate characterized by mild springs and cool winters. April is typically a transition month with warming temperatures as the region moves toward summer. Historical climate data shows that April 20 in Busan averages around 16–18°C (61–64°F), making a high of 15°C or below a cooler-than-typical outcome for this date. This market resolves on April 20, 2026, using the official high temperature recorded by Korean Meteorological Administration stations in or near Busan. The 0% YES odds indicate the market is pricing an extremely low probability of such a cool day—traders collectively expect Busan's high on April 20 to exceed 15°C. This reflects both typical spring weather patterns for the region and any current seasonal forecasts available to traders. Trading this market involves predicting whether actual conditions will surprise to the cold side of market consensus. The market becomes resolvable at the end of April 20 UTC, once official KMA data is published. With $11K+ liquidity and $2.7K daily volume, this recurring daily temperature market offers real-time trading on resolved regional weather outcomes.