Diverging ensemble forecasts from major models create closely matched market odds between elevated and suppressed minimum temperatures for Denver on September 14, as southerly flow and variable cloud cover influence overnight radiative cooling. Official guidance points to lows in the mid-50s Fahrenheit—near the early-September climatological average of roughly 50°F—with isolated thunderstorms possible that could limit cooling or enhance it depending on timing and coverage. Recent high-pressure building and dry conditions have favored clearer skies and stronger temperature drops in prior nights, yet model spread on precipitation timing keeps both the 78°F-or-higher and 59°F-or-below outcomes competitive. Updated runs from the GFS and ECMWF, along with National Weather Service local forecasts, will likely narrow the range ahead of resolution.