Korea Meteorological Administration (KMA) observations confirm Seoul's April 2026 precipitation totaled just 34 mm through April 26—less than half the historical monthly average of around 65–73 mm—driving trader consensus to a 98.2% implied probability for under 40 mm. This unusually dry spring stems from dominant high-pressure systems suppressing moisture influx, punctuated only by light spring rains around mid-month (10–20 mm nationwide, lighter in Seoul). With four days remaining and KMA forecasts showing mostly cloudy skies with low precipitation probabilities (under 30%), the market reflects strong evidence of a record-low total. Realistic challenges include an unforeseen late-month deluge exceeding 6 mm daily, though model consensus indicates minimal risk as the month closes. Final KMA monthly summary expected shortly after April 30.