California Central Valley 85-90 the norm,hot is 105 give or take another 5.
I have an old Harley t shirt that says
"If you can't stand the heat,stay out of the valley"
Riding in 110 heat is like taking a nap in a pizza oven.

Serowbot wrote on 07/12/16 at 22:41:25:

Not sure I could ever get used to it.....I tend to sweat a lot when it gets really hot.

I believe in ATGATT, and I really should find a mesh jacket that can offer protection.  My jackets are all suitable for cooler weather and have zip in liners......I need to find something that is really made for hot weather riding and has good airflow.

I ride in 100+, not saying it's comfy, but I ain't dying
Leather unvented jacket, no liner
the mesh jacket is hotter, above 95 and at speed
above 95 wind chill works in reverse, and evaporative cooling isn't efficient enough to keep up, especially in high humidity (swamp fan don't work in Houston)

I like protection. I wear a jacket regardless of temps.( but we rarely see it in the 90's here).
What happens here is youll need a jacket and liner in the morning and take the liner out in the afternoon and it's still hotter than hades.
The faster you get the wind rolling thru the better off you are tho. Not much city riding here so you can get out there in the wind and stay there.

My jacket is all mesh except for the pockets. The heat retention comes from the pads at elbows, shoulders and back. But I very rarely ride without it on. It is not a whole bunch of protection but it is better than riding in just a shirt. I got it very cheap from Jafrum.

I only wear the leather jacket when it gets cold. And the colder it get the more protected I am because the number of layers under the jacket increases. Yeah, I bought the leather jacket about one size too big to make room for the layers. I also got the textile insulated riding pants from Jafrum. They offer protection from the cold as well as from the fall. I just need warmer gloves.

Duct tape,,,