Welcome.
Long thread here outlining how to fix it for a few ¢ too:
www.jeeprenegadeforum.com
Long thread here outlining how to fix it for a few ¢ too:

Outside Temperature Sensor
My renegade is reading the outside temperature sometimes 10 degrees warmer than it is. Today it was 80F but the temp said 94F. Does anyone else have this issue? Thanks