Recent National Weather Service and local model guidance points to a cool, moist air mass arriving ahead of a frontal boundary, with Denver expected to see mostly cloudy skies, light rain, and a low near 51–53°F on September 24. This setup favors radiative cooling under lingering clouds while limiting afternoon warming, keeping the overnight minimum well below seasonal averages near 46°F yet above the coldest historical analogs. Uncertainty in exact cloud cover, wind speeds, and timing of any clearing creates a narrow window where the low could dip to 51°F or below if skies clear earlier, or remain higher if mixing persists. Traders appear split on these threshold details, as small forecast shifts in boundary-layer moisture and wind could decide resolution between the closely matched leading outcomes. Updated model runs and NWS briefings over the next 48 hours will likely refine the temperature trajectory.