it's a A little cold...but I wouldn't worry if 60 is your low.
there was something about coldness and THC production.
the cooler the temp makes the plant produced THC with increased potency, but with a lower yield.
Higher temps (I think they were talking about 90 to +90F)
produced lower THC potency, but higher yield.
I never messed with it. Might be some truth to it.