[Vince Ferrer]

Sunny, no wind, and 25 degrees can be tee shirt weather if you’re out being active

I have explained that to a lot of people, and no one understands it.

[dhs12345]

Agreed. As long as your core is warm. I have hiked with shorts in 20 deg temps. Not recommended if you don't have the right clothing because eventually you will slow down. I had goretex pants and coat and sweats that I could pull over my shorts.