I use to monitor but its very subjective-relative and unless you see really different temps not telling much IMO. However everything Ive seen points to above 160° reason for concern with 200° max. 80° ambient avg. might be 125° or plus 20-60° over ambient. Best is to monitor-see what your average rise is and use as base (& compare to what feels like with hand touch). Checking once stopped I just palm tires-generally sunny side will be 5-10° warmer with inside duals a few degrees higher. Ill palm rear hubs relative to each other. Never wheels-especially fronts. Trailer in tow, I pay a bit more attention to hub & tire temps.
I coulnt say you might stave off tire failure heat related unless you had in use monitors.