Seoul experiences spring temperatures in mid-April, typically ranging from 10°C to 20°C. A high of exactly 15°C represents a cooler-than-average day for this season, though it falls within the normal seasonal range. The market pricing at 1% reflects the specificity of the prediction: daily temperature data from Seoul weather stations is publicly reported and verifiable, making this market straightforwardly resolvable based on official meteorological records. Historical April data shows that 15°C highs occur roughly 5–10% of the time in Seoul, though exact frequency varies year-to-year based on broader spring weather patterns and seasonal pressure systems. The low probability reflects both the precision required—exactly 15°C, not a temperature range—and typical meteorological variations that Seoul experiences during spring transitions. Traders monitoring this market are essentially predicting Seoul's spring weather trajectory, whether a cooler pressure system or warmer air mass will dominate conditions on April 19. Market depth at $7,572 provides reasonable liquidity for position sizing and risk management. The outcome will be definitively determined by official Seoul Meteorological Administration data published at the market's resolution date.