Absolutely! The best way to measure such a streak I can think of is to count consecutive days between 40 and 80 degrees, as these temps roughly delineate summer from fall from winter. More than about ten straight days is somewhat rare which is a bit surprising. In data going back to 1980, 2003 was the grandaddy of all falls with not one, but two streaks of 10 days plus. Also, between Sept 20 and Oct 20 is the typical time range for "true fall" (if you will) is to occur. This year could have had a good streak going, but a couple warm days interrupted it. Even so, it has been consistently fall-like and should remain so for the foreseeable future, and should make a run at an impressive streak!