**Forecast uncertainty from an approaching cool front and variable cloud cover is driving the tight clustering of trader odds around the mid-to-upper 60s°F for Denver’s October 1 high.** Official National Weather Service guidance and recent model runs point to a daytime maximum near 63–65°F under partly cloudy skies with a 50% chance of showers, following widespread rain and northerly winds on September 30 that have already lowered temperatures into the mid-50s to low 60s. East to northeast winds of 10–15 mph with gusts to 20 mph will limit afternoon warming, while any breaks in cloud cover or lighter precipitation could allow readings to reach 66–69°F. Historical early-October climatology for Denver (typical highs near 65–70°F) provides context, but the current pattern favors the lower end of that range. Market-implied probabilities reflect this narrow spread: the 66–67°F bin leads at 28% because it aligns with the most likely outcome if skies partially clear, while nearby bins capture model disagreement on exact timing and intensity of showers. New NWS updates and afternoon observations on September 30 will be the key near-term catalysts.