Recent National Weather Service and model guidance indicate a cool northerly flow and possible showers lingering into October 1, with forecast overnight lows for Denver clustered in the upper 40s to low 50s. Variable cloud cover and precipitation timing create the main uncertainty: thicker clouds or earlier rain reduce radiative cooling and support higher minima near 50–52 °F, while partial clearing under drier northerly winds allows greater overnight heat loss and readings dipping toward 46–48 °F. Historical early-October climatology shows typical lows near 45 °F, but the current pattern’s modest cold-air advection and moisture keep the distribution centered around the middle bins. Updated model runs and evening observations on September 30 will refine the exact minimum before market resolution.