Those temps are fine. Maybe if they were newly planted seedlings that werevery delicate there could be some shock and setback but they can easily handle 50f, and they can handle nights in the 40s.
It's dipping into the upper 30s here tonight. They'll be ok.
If you're expecting unusual/heavy rain for 4 straight days.......you may want to protect them from it. Some sort of plastic dome over them could be good. I would lift it up every time you get a break.