temperature to clay bar

After reading all these great clay bar post, planning to clay my 2007 taco. High tomorrow is 67 in Virginia, but is there a temperature the truck surface should be to clay? Low is 40 tonight, so didn't know if I should wait until the afternoon when it warms up - also should I do my leer tonneau top? Thanks as will be first time

 

Nanoskin autoscrub.

You'll never use clay again.

 

That temp is fine. I did both vehicles last week in similar temps.