An incoming cold front and associated upper-level trough are driving National Weather Service model consensus toward a high temperature in Denver on May 18 well below seasonal norms, with most guidance indicating afternoon readings in the mid-40s to low 60s°F amid northerly flow and possible snow showers. This setup represents a sharp departure from mid-May climatology, where highs average near 72°F, and the strong agreement among forecast models leaves little room for warmer outcomes. The market’s near-certain pricing on 61°F or below reflects this robust observational and dynamical evidence. A slower frontal passage or unexpected southerly wind shift could allow modest warming into the mid-60s, though such deviations appear unlikely based on current data.