Weather.com has us at 45-48 degrees all weekend. I am cold already!
This is going to sound like a joke, but I promise it's not.
I cherish the days we have a 48-degree temperature at the time our HS games start, especially if there's not much wind. That's about as warm as we get for 2/3 of our season.
Some schools around us use 40 as a cutoff point. Others will play if it's above freezing.
My personal threshold depends on how many games in a row we've had to cancel and how likely we are to beat the team.