My original shop was just a small shed, sort of like the Tough Sheds sold all over the country. I wired it then insulated then sheet rocked. When summer hit I added a small window air conditioner and had a small electric heater for the winter. Temps ranged from 20 to 115.
That was in Calif. and if I wasn't in there building then the heat and air weren't on.
Now I'm in Vegas and the new shop is a bit better insulated but when it's a 115 the shop temp is in the high 90s. I keep my main bottle of CA in the freezer but leave a 2 ounce bottle on my bench. None of my glues dry out or harden. The wood doesn't warp. My old building board is just 3/4 pine glued together with cross slats on the bottom to keep it from warping. I did use biscuits when I joined the pieces. It's over 20 years old and still flat.
I turn on the air while I'm out there working but I only set it for 80 degrees.
The main thing is it's almost never humid here. Moisture and heat will jump up and bite you.