Frost and Rain.

It has frosted twice already in the last week. Once Friday, and once last night. On top of that it has rained all day today, and it is 58 degrees, suppose to drop down to 40 tonight. Should I go ahead and harvest these and take what I got, or let them go, and possibly lose them?

because most trichromes are somewhat protected, it's possible a majority of the trichromes didn't freeze. i would watch it a few days and it it looks like all downhill then harvest.
after harvest make sure to keep the air flowing around the buds to reduce possible bud rot. GL

Go out and shake the excess water off between showers if you get a break, but I don't think the temps will bother her.
My plants are liking the cold snap I have here now.

take yer chances

I am well aware of your weather situation and I think you are pushing your luck, particularly after that last frost. Looks like more rain and cold on the way as well. When you do yank them, I'd immediately trim off at least the fan leaves and get some low humidity air circulation going.

EDIT: I really don't think they are going to put on any more weight at this point so your only reason for leaving them is if you think it will enhance the potency.

that bud is on the verge if conditions like that hold. keep an eye out for those shriveled looking leaves that signal mold. i would personally chop and have premature than risk mold. my personal preference.