The weather here is getting colder out and i noticed that the temperature on the temp guage is pretty low after i get moving. It almost cools all the way down on the high way. When i stop at a light it warms up to normal. I'm thinkin the thermostat is bad ? Any ideas ?

 

your thermostat is stuck open, therefore letting water flow continuously through the radiator. when you stop, the cool air stops rushing into the radiator and the water starts to slow down, thus heating it up. just replace you thermostat and you'll be cool.