That forecast sounds like good detail weather for our northern brethren, but you're in Texas! I'd wait a week for better weather!
As Scott said, your polishes will require a bit more work - particularly if it is humid. I find that cold humidity really affects diminishing polishes; if the car gets kind of damp you can't get the product to break down as well and if it gets too damp the product won't break down at all - I find that they get more abrasive than usual because you aren't breaking them down.
I've never used Zaino so I can't help you there...but seriously if you are a hobbyist you may be better off waiting. I know when I tried to detail in similar temperature conditions with the cold bringing humidity to the cars surface I was real sorry.
If you do go forward with your detail, I'm sure a lot of folks will be interested in the results.