I have a cheapo EZ-Viz camera in the attic to monitor temperature/humidity... It used to get to 130ish up there until I installed a solar fan last year... now seems to top out at 115ish.
But we haven't had 100-degree temps like they're forecasting for the coming week!
My mini PTZ runs as much as 160+ degrees in the sun, and I have a number of cams fully exposed to 95 degree heat and 80+% humidity.
If it wasnt for the sunlight eating up the lens covers they'd be fine