Pills left in extreme cold

Nadine

I was away from home for a few days and got three packs of birth control pills (Junel Fe, 1.5/30) in the mail from my pill subscription. I live in Montana and we’ve been having extreme temperatures recently (in the negatives) and I was wondering if these are still good to take? I’ve heard of heat and moisture screwing with pill effectiveness, but not much about freezing temperatures for long periods of time.