Buenos Aires, the capital of Argentina located in the Southern Hemisphere, experiences mild autumn weather throughout April as the season transitions from summer to winter. Temperatures typically range from 18°C to 24°C during this month, though precise daily highs vary based on atmospheric pressure systems and wind patterns moving across the region. This market asks a very specific question: will the highest temperature on April 19 be exactly 21°C? Currently trading at 1% YES odds, the market reflects trader consensus that hitting this precise temperature is unlikely—even a single degree variance in either direction (20°C or 22°C) would result in a NO outcome. The resolution depends on official temperature records from Buenos Aires meteorological stations for April 19, making this a deterministic and verifiable outcome. The narrow 1% odds underscore the mathematical difficulty of predicting exact temperatures rather than temperature ranges. With $2,901 in liquidity, this short-dated weather market provides sufficient depth for real-money trading and appeals specifically to traders focused on precise meteorological predictions.