São Paulo's daily maximum temperature for April 20, 2026 represents a specific, time-bound weather event that can be verified through official meteorological data, making this prediction market fully resolvable. The market asks whether the city's highest temperature will reach exactly 31 degrees Celsius on this date. At current odds of 0% for YES, traders have assigned minimal probability to this specific outcome, expecting the actual daily high will fall either below or above this precise threshold. Exact-temperature prediction markets are notoriously challenging to trade because real-world weather varies in fractional degrees and decimal points, and hitting one precise number requires substantial atmospheric alignment. São Paulo in April typically experiences warm autumn weather patterns, with daily highs commonly ranging between 26 and 32 degrees Celsius depending on regional atmospheric conditions, seasonal wind patterns, and humidity levels. The 0% odds reflect strong trader conviction that 31°C is an unlikely outcome for this particular date. The market currently holds $6,500 in total liquidity alongside $623 in 24-hour trading volume, which is typical for recurring daily weather prediction markets that reset each evening. Resolution will be determined by official weather station data published for São Paulo at market close time on April 20.