Denver, Colorado typically experiences mild to warm temperatures in mid-April, with average highs around 60°F. This market asks whether the highest temperature on April 20 will fall within the narrow 38-39°F range, which would require significantly colder conditions than seasonal norms. Such temperatures would represent a freeze-level event for late April in Denver, suggesting a late-season cold snap or arctic air mass would need to move through the region. At 0% odds, market participants currently assess this outcome as extremely unlikely, reflecting historical patterns showing Denver rarely drops to such levels in late April. This would require unusual atmospheric conditions to develop. The market is pricing in the very low probability of a dramatic temperature departure from typical April weather. This market resolves using official National Weather Service data for Denver International Airport, which provides the authoritative high temperature record for the day. The specificity of the 38-39°F range makes this a precise prediction that either clears or misses that single degree window based on recorded data.