The social wasps - wasps, hornets, yellowjackets - all die in the fall except the queen, which hibernates (in the ground, I think). Yellowjackets in particular always seem to get dopey this time of year - more pesty about your food, less aggressive about stinging, easier to smack'
Most yellowjackets we've ever had in a house where I lived came when I was 5 y.o and came screaming thru the door with some awful buzzing coming from my clothes. My mom had me strip to skivvies and hide in the bathroom while she did battle with a flyswatter. With 5 down she gave the all clear but as soon as I came into the living room another flew out from under a lampshade and away I scrambled - twice. Ended up with 7 lined up on the windowsill. Can't remember how many stings I had, but it was the first of many dozen painful encounters with yellowjackets, wasps, hornets (and the occasional bumble or honeybee.)