April 18 marks mid-spring in New York City, a transition period between cool mornings and warming afternoons. Historical weather patterns show daily highs in mid-April typically range from 55 to 62°F, making the 56-57°F range plausible but specific. The current market pricing of zero percent suggests traders view this narrow band as unlikely—they may expect the day to be warmer (60°F+) or cooler (below 55°F). The market resolves based on the daily high temperature recorded by the National Weather Service at Central Park's official weather station, typically reported by noon on April 18. Why this range is resolvable: temperature data is objective, measured in real time, and published immediately by government meteorological services. The 0% odds reflect the inherent challenge of predicting within such a tight 1-degree band; while 56-57°F falls within normal April conditions, hitting this exact range requires precise atmospheric alignment. These recurring daily temperature markets allow weather-focused traders to speculate on quantifiable meteorological outcomes. Temperature prediction markets test your weather forecasting skills against market consensus on observable, verifiable data.