Oct is usually a quite weather wise, the monsoon season ends late August to early September. In the old days, meaning 5 year so years ago, the monsoon season was determined by the dew point, not there are firm dates which don't really mean much. Our wet season starts in November with most rain in Jan and Feb. There is always the possibility of early snow in the higher elevations, don't recall it ever snowing in Sedona in Oct. Even if you are bringing a digital camera I would still take a roll or two of color, Extar 100 or Porta 400, film has a different look than digital color.