Warsaw in mid-April typically experiences spring conditions with daytime highs ranging from 12–16°C as the season transitions toward warmer months. This prediction market focuses on a specific, objectively resolvable question: whether the highest temperature on April 18 will reach 20°C or above. A reading at or above 20°C would represent notably warmer conditions than the seasonal norm for Warsaw at this time of year. The current YES odds of 2% reflect the historical rarity of such warmth in mid-April, though early warm spells and föhn-like wind effects can occasionally push temperatures higher than typical. The low market price suggests traders expect cooler, more seasonally typical conditions to dominate on April 18. As the forecast date approaches, the odds may shift if meteorological models signal an unusual warm pattern. Resolution will be determined by the official maximum temperature recorded by Warsaw's weather station for April 18.