Fall already..?

My definition of spring is when I no longer need something to cover my ears when I run. Below +10 C, and I start to get cold, below +5 C and I definitively need something on my head.
My definition of fall is when I, yet again, need something for my ears.

Went out late this evening, around 10.30 pm, and it was coooold. My ears told me it must have been around 10 C, maybe 12. A few degrees colder, and I would have liked something over my ears- and it would have been fall.

http://www.endomondo.com/workouts/gXElAPjxNf8