I have lived here in the high desert for a number of years. We regularly see a drop in demand at the end of summer "back to work/school", and over the holidays that seems to be brought on by the time change. Many people don't want to move over the holidays.
Investors are aware of this, and often pick up the best bargains in November and December, so they have houses to sell in the spring when the demand is overwhelming.
Don't hesitate to call me, we can go over the recent "Market Condition Report" that will explain where the market has been and is going.