Recent National Weather Service and model guidance indicate Denver highs on October 1 will likely fall in the mid-to-upper 60s, with partly cloudy skies and a 30-50% chance of showers moderating daytime warming under northerly flow. This aligns with the seasonal transition toward cooler autumn conditions, where average highs decline from the low 70s in late September. Ensemble forecasts show limited spread but highlight sensitivity to cloud cover and precipitation timing, which can suppress peaks by several degrees relative to clear-sky potential. Historical analogs and climatological baselines place early-October maxima near 72°F, yet current pattern support for the 66-67°F bin explains its leading market-implied probability amid ongoing model updates ahead of the date.