Coolant temp fluctuation

As a new member to the Ferrari realm, I am still learning my way around my 360 (99 F1 Modena Coupe) so please forgive me for my naivety. My question pertains to the coolant temperature.

During normal driving (6th gear at highway speeds), the coolant temp sits at 170 degrees. This is what I normally notice whether the A/C is on or not.

However, I have noticed that if I end up at a stale red light idling for an extended period (~3 minutes) or get caught up in stop-and-go traffic during the summer months (air temp can get up to 90+degrees), I notice the coolant temp gently climb to 210 degrees. As I then begin to get up to speed, the coolant temp gently falls to 170. The coolant temp never gets past 210.

My question is whether this fluctuation in coolant temps is normal? I know that when the temp reaches 210 the radiator fans kick on. I have received no warning messages from the on-board computer. Car behaves great. So I'm basically curious whether this is normal behavior for my other vehicles seldom have such fluctuations in coolant temp.