From The Aspen Times:
According to preliminary data for the month of September, logged at the Aspen Water Department, Aspen saw scant precipitation on just five days during the entire month, and no snow fell in town. Area peaks were dusted with snow a couple of times in September, though. The water plant recorded 0.71 inches of rainfall in September, below the average of 1.8 inches for the month. The average high temperature was about 72 degrees, and the average low hovered at a relatively temperate 40 degrees or so. The high for the month was 80.7 degrees, recorded on Sept. 20.