Seattle's spring weather is notably variable as the region transitions between seasons. April temperatures typically range from the low 40s to mid-50s Fahrenheit for daily highs, though occasional cold snaps can bring temperatures into the 30s. A high of 31°F or below would represent unusually cold conditions for mid-April, requiring an arctic air mass to push southward from Canada into the Pacific Northwest. The current 0% YES odds indicate that traders view freezing-level conditions as extremely unlikely on April 18, 2026. Market participants are pricing in temperatures substantially above the 31°F threshold, consistent with normal spring weather patterns for this date. This market resolves using the National Weather Service's official recorded high temperature for Seattle. The sustained 0% odds reflect strong trader conviction that April 18 will not see freezing-level highs in Seattle. Throughout the market's lifecycle, participants have consistently assessed the probability of a 31°F-or-below high as near zero, suggesting confidence in seasonal warming patterns. The odds structure indicates traders expect April 18 highs in the mid-40s to low-50s range, well above the freezing resolution threshold.