Recent National Weather Service and model guidance positions Denver’s overnight minimum around 49–56°F under mostly clear skies and light southwesterly flow before an approaching cold front increases clouds and shifts winds northeastward after midnight. Radiative cooling under dry air and initially calm conditions supports the market’s strong consensus on 56–57°F as the day’s low, while the timing of frontal passage and any residual mixing introduce modest uncertainty that keeps 54–55°F probabilities elevated. Historical October averages near 38°F highlight how this mild airmass keeps the outcome well above typical minima, with final readings hinging on the precise hour the front arrives and associated wind shifts.