The temps by my house are getting cooler already. Granted, I live at 7,000 feet above sea level, but still, that chill is in the air, and fall is fast approaching. And in our neck of the woods, that means snow could fall at pretty much any point from now until December, when things tend to hit the fan.
I recall one late August's adventure into the real high backcountry when I saw 6 inches of snow fall within the span of two hours. Again, in August.