Miami in mid-April experiences warm, humid conditions as spring transitions toward early summer patterns. The question asks whether the highest temperature recorded on April 20 will fall within the specific 90-91°F range—a relatively narrow band compared to broader seasonal variation. Market resolution is straightforward and objective, relying on official National Weather Service high temperature readings for Miami. At 0% current odds, the market reflects essentially no conviction that the day's high will land precisely within this two-degree window. Historical data shows Miami's April highs typically range between 85-92°F, making 90-91°F plausible but not dominant. The market's pricing suggests traders lean toward outcomes outside this range—either cooler days below 90°F or warmer ones above 91°F. As April 20 approaches, weather forecasts will become increasingly precise, potentially reshaping trader positions. Temperature-based prediction markets like this offer appeal precisely because outcomes are objective, verified, and impossible to dispute once meteorological agencies publish official readings. Traders in weather markets benefit from clear, measurable resolution criteria that leave no room for ambiguity.