Forecast models from the National Weather Service and private sources indicate Denver's September 1 overnight low will likely fall in the mid-to-upper 50s°F amid partly cloudy skies, light winds, and low precipitation chances, consistent with climatological norms near 55°F. Recent warm, stable high-pressure patterns have limited cooling, while model spreads on timing of any weak front create uncertainty around exact minima. This underpins the near-even market split between sub-53°F and 72°F+ outcomes alongside clustered probabilities in the 54–71°F bands. Historical records show September 1 lows rarely dip below 43°F or exceed 69°F, underscoring how modest forecast revisions could shift resolution between the leading categories. Updated NWS guidance and overnight observations will provide the next key data points before market close.