How cold is too cold?

So tomorrow night its suppose to get down to upper 20's into low 30's for the night then warm back up into the normal of 40's at night. I don't want to pull yet because I still have a bit of time left but this early freeze has me a little worried. What do you guys think should I pull them or see if they can make it through the night?

Check them around lunchtime whenever it gets cold the night before. When they get to the point in which they don't seem to be perking back up or they are loosing color just pull them.

From my experience atleast I've found the bud and trichome production slows down greatly when it starts to get into the 40s or lower so it usually the end of the line soon then after even if it doesnt kill em

I think I'm going to let them be to see what happens. It has been warm during the day here in the low to mid 60's and a day or 2 in the 50's. I have a feeling the plants will be fine because the roots wont freeze. The next day the weather is suppose to be warming up close to the 70's. Ill keep my fingers crossed for the best.