Current forecasts from the National Weather Service and other models indicate a mostly sunny to partly cloudy Sunday with a daily low in the mid-to-upper 50s for Denver, driven by southwesterly flow and limited overnight radiational cooling under partly cloudy skies. Trader sentiment remains split between sub-48°F and 66°F-plus outcomes because ensemble spreads show potential for either stronger cold-air advection behind a passing trough or enhanced downslope warming if high pressure builds more firmly. Key variables include the exact timing of any frontal passage, dewpoint trends, and wind speeds overnight, with new GFS and ECMWF runs expected to narrow the range before resolution. Historical late-September minima average near 45°F, underscoring how deviations from this baseline hinge on short-term synoptic evolution.