I like to know the weather temperature when riding. Dyna doesn't come with a thermometer standard.

In the 2018 HD Parts and Accessories cataloge, Audio and Guages, Page 829. They have Celsius temp guages with mounting options. 

Or you could stop and look at your phone and save a few bucks. 

i just wipe my forehead with the back of my hand ,if its wet its either raining or bloody hot.cheers

Thanks guys, will consult the catalogue while wiping my largish forehead and checking the phone