Those analog gauges aren't always accurate. What does your digital instrument panel say the engine temp. is? That "might" be more accurate.
At least on my 2008 KSDP w/ Spartan MM chassis, if I press the upper instrument display button enough times I'll get engine temperature. Also transmission temperature.
Engine temp. also depends on ambient temp., are you using the dash air-conditioner, and are you going up a steep hill. If it's hot outside, and you're using the dash air-conditioner and you're going up a steep hill, that's a lot of stress -- and the engine can run considerably hotter than normal.
Woody & Sandy
2003 Chinook Cascade
2008 Newmar Kountry Star 3623