... wasn't a month or time of year but more like a style of weather.
Because it was after Labor Day, the temperatures were warm enough but not hot and humid. And because it was before Halloween, the temperatures were not cool to chilly.
Also, the skies were bright and sunny but not blinding enough for sunglasses. And often, a few clouds were in the sky.
A couple of Saturdays earlier this month -- one was yesterday, the other I forgot offhand now -- were like that: The perfect weather for a great day of college football.