At what point can you begin to feel the seasons change in your body? Are you in tune with nature to be able to pinpoint these changes?

I get an email about season changes and things to think about and things to do. It's somewhat Pagan inspired. I do some of the things in it. I don't necessarily feel the changes in the seasons outside reflect what my body/mind/soul is going through though. I also am housebound due to a health condition so am a bit less aware of nature seasons as I'd like to be but I get nature brought in from outside and look at pictures.
I reflect on things a fair amount. Situations, feelings, perspectives.

When the hot hot nights come to an end, and the smell outside in the morning.

we all are in tune because of the circadian cycle. it's biology.

when my balls start to rise towards my stomach I know winter is near

Sickness and colds..

I've always loved autumn. I love how the foliage change colors, the soft cold breeze of the coming winter and how I could take long walks. :)

My allergies act up when seasons change. All 4 of them.

You feel the cold air around you, disguised by the hot sun. You can sense a earthy smell and the only flowers left are the ones that survive fall.