Chicago's high temperature on April 20, 2026 is the subject of this weather prediction market, which focuses on an exceptionally narrow temperature band. This market requires the day's highest temperature to fall between 72 and 73 degrees Fahrenheit—a tightly constrained range of just one degree. The current zero percent YES odds indicate that traders collectively believe Chicago's high temperature will fall outside this specific range on April 20, suggesting strong market consensus. Resolution depends on the official high temperature recorded by the National Weather Service for the Chicago metropolitan area. This type of market appeals to traders seeking highly specific meteorological outcomes, as it requires precision within a single degree band. Such constraints make weather markets particularly interesting for those trading on detailed forecast accuracy and unusual weather patterns. The odds trajectory shows strong early conviction that the narrow band will not be reached, though weather forecasts can shift substantially as the date approaches. Markets like this provide opportunities to trade on hyper-specific temperature outcomes, whether for weather-related risk management or speculation on meteorological precision.