Forecast models from the National Weather Service and local outlets indicate overnight lows for Denver on August 27 in the low to mid-60s °F, with highs near 90 °F under partly cloudy skies and a modest chance of isolated thunderstorms. This positioning keeps the 60–63 °F bins as the market leaders because limited radiative cooling overnight—due to cloud cover, higher humidity from potential convection, and light winds—prevents sharp drops below the climatological average low near 56 °F. Model consensus shows only modest spread from variations in storm timing and boundary-layer mixing, while historical precedents for late-August minima near 50 °F or above 68 °F remain unlikely absent a stronger cold advection or clear-sky radiative event. Traders thus cluster probabilities around the narrow forecast envelope ahead of the next model runs.