This seems to be happening elsewhere, too. The largemouths in some ponds are slowing down a bit, but thankfully the river smallies are still very willing participants in my escapades. They're a bit more tolerant of the cooling water.
And FWIW, keep in mind that it's the water temperature that affects the fish, not the air temperature. I've had great fishing all to myself in recent years because a few cold snaps have chilled the air and sent anglers packing, but the water temps were still reasonable for a few more weeks.