Just a suggestion cause mine does the same exact thing, luckily the fans kick on at a little past 210... by the way its a little difficult to determine what temp each line indicates, except for the ones already marked. So im gonna say the fans kick on at about 220. 220 is past the halfway mark, and is deathly close to the red hash mark. Obviously these cars are not meant to run that high, thats just too jacked up. Too close for an easy head gasket failure. I've had this problem for close to 3 years, and I live in Oklahoma, the weather gets to about 110+ every summer. Last year we had some record breaking weather with about 120+ for weeks on end. I drove the car, but I stuck strictly to highways because the wind brings the temp down a lot... for me it came down to 195*. My A/C also doesn't work. I definatley need to fix that, lol. Its too damn hot. But my next step is to replace my coolant level sensor, its located right below your radiator cap, its a square sensor. Maybe that will kick these fans on at an earlier temp, if not than I'll replace my fan motors, and reprogram my fans to kick on at about 195*. Thats always a good option. But as far as this heating issue goes, I'm in the same boat, I've done my LIM's twice now, and replaced every cooling system component, except for the fan motors and the coolant level sensor, nothing else has made a difference.
This is where my temp use to run constantly, A/C wasn't on, so that means fans wasn't on either. Temp never went any higher, just stayed in this exact spot after the engine got to normal temp, nothing was wrong with my gauge, or any sensors.
This is how high it gets currently, then the fans kick on to bring the temp back down:
This is how hot it got outside, with no wind. (The outside temp sensor is working, it was brand new.):
