Buenos Aires transitions into autumn during mid-April, with historical high temperatures typically ranging from 18 to 22 degrees Celsius, modulated by Atlantic pressure systems and occasional cold fronts migrating northward from Patagonia. A maximum temperature of 15°C or below would signal an unusually cold day for the period, requiring either an unseasonable late-season cold snap or a stalled low-pressure system anchoring frigid air over the region. The market resolves on April 20, 2026, using the official high temperature recorded by Argentina's national meteorological service. Current pricing at 0% YES reflects strong trader consensus that temperatures will exceed 15°C, grounded in decades of climatological data and recent weather forecast models indicating warming trends across the Southern Hemisphere for this period. Market participants are essentially pricing near-zero probability of anomalously cold conditions, signaling high collective confidence in above-threshold outcomes. While prediction markets aggregate dispersed information efficiently, actual weather remains inherently uncertain—unexpected cold frontal systems or polar air outbreaks can easily override prior expectations and deliver surprises. This market allows traders to take positions on whether April 20 will deviate significantly below seasonal norms. The resolution mechanism is transparent and objective: outcome depends purely on the recorded high temperature from Argentina's meteorological authority.