April 21 in Toronto typically experiences mild spring conditions with highs ranging between 8°C and 15°C, though variable weather patterns across April make wider swings possible. This prediction market focuses on a specific and narrow outcome: whether Toronto's highest temperature on April 21 will reach exactly 5°C—a cool outcome relative to seasonal averages. The 1% YES odds indicate traders estimate only a 1-in-100 probability of this cold-snap scenario materializing, implying strong collective expectation of warmer conditions and temperatures above 5°C. The market's high specificity (an exact temperature, not a range) creates a narrow resolution window that makes the outcome unlikely but not impossible. Liquidity exceeds $2,600, allowing traders of various conviction levels to express views on Toronto weather without slippage. Historical April data shows that 5°C highs do occur in Toronto during late spring, but rarely—perhaps once every 4–5 weeks on average. The low odds reflect the market's assessment that warmer spring air masses will dominate on that date. Resolution occurs at midnight UTC on April 21 based on Environment Canada's official recorded high temperature for Toronto.