Treefort management has already planned for the cold by installing tents with portable heaters in them so if concert attendees get too chilly, they have a place to go to warm up.
But pre-sale tickets have already tripled the numbers from what was sold at this time last year so concert planners don't expect any serious financial hits due to the weather. And they think people will come out this weekend anyway and buy more tickets.
"I don't think it will effect it too much. This is Idaho and people are really hearty here. They know that weather can really fluctuate. I think people have coats that can handle it," says Matt Dalley, a Treefort spokesman.
If people get too cold for the main outdoor stage they are welcome to move to one of the other twelve indoor concerts happening across town.
If you are going to Treefort on Friday night, here is what you will find on the main stage at Twelfth and Grove.
Pickwick plays just before six o'clock. Delicate Steve will perform at seven o'clock. At eight-thirty you will hear Sharon Jones and the Dap Kings.
On Thursday most of the venues were full, including the Shriners facility, which can hold 600 people!
Concert managers tell us that they have not had any complaints from band members about the cold.