As others have said, that is normal for the Pentastar. In the event that you over do it and your engine starts getting too hot, you will get a warning message on your dash letting you know to stop and let it cool off for a bit.
2014 JKU here with 109K miles can confirm at 105 outside temps my guage can climb as high as 219 so far this was the highest perfectly normal then it dips back down to 208, 204, etc etc...your good, worry when that red needle goes all the way to the right or you start getting into the 240-260 range or above that.
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