Seoul experiences variable spring weather during mid-April, with daily highs typically ranging from 12°C to 18°C depending on weather systems moving across East Asia. The specific prediction of exactly 9°C for April 20's high temperature represents a notably cool day that would fall slightly below typical seasonal averages for the region. The market's current odds of 0% YES suggest strong consensus among traders that the day's maximum temperature will differ from this precise target. Weather prediction markets resolve based on official Seoul meteorological service data, specifically the highest recorded temperature for the calendar date. April 20 falls within a period when Seoul can experience significant day-to-day temperature swings driven by frontal systems and air mass changes. The 0% pricing reflects the narrow resolution criteria—weather must peak at exactly 9°C, not approximately or within a range. Historically, such specific-degree predictions attract lower trading volume outside of anomalously cold or warm periods. This market demonstrates how prediction markets handle precise numerical outcomes where small deviations in actual conditions determine final resolution.