Forecast consensus from National Weather Service and private models places Denver’s September 29 high in the mid-to-upper 60s, driven by a cooler post-frontal air mass and increasing cloud cover with light showers that limit daytime heating. This setup contrasts with the late-September climatological average near 73 °F. Market-implied probabilities cluster on 66–69 °F bins because small differences in cloud timing, shower coverage, and boundary-layer mixing can shift the daily maximum by a degree or two; stronger northerly winds or earlier precipitation would favor the lower end, while partial clearing could push readings toward 68–69 °F. Updated model runs through the weekend will refine these details ahead of resolution.