While I agree with you that there isn't enough daylight left to ride after work (without leaving early, that is...), my bikes insist that we should still have many weekends of very rideable (and even comfortable) weather this year.

I also switch to alternate forms of week-day exercise for the our shorter days and upcoming colder weather, but I try to get in weekend bike rides through the fall and even in the winter if the roads are dry. I managed to ride in temperatures to the low 30s last winter, and I'm hoping to continue that habit this year. Here's hoping that the weather wizard gives us a reasonable number of days with dry roads through the winter!