Cool Damp Nights and a worried newby

I'm in New England near cape cod. The nights are getting cool and hitting dew point early and not drying out till late morning.

While looking the girls over I found a bud that was going brown and not looking good. It looked like it was rotting so I pinched it off, cleaned off all the bad looking crap and will let it dry the give it a test toke.

The question is...is this a result of the cool humid nights and is there a way to protect them from this spreading?

the trichomes are still mostly clear and only a very few hairs are going amber so I don't think they are quite there yet. What should I do.

I would start chopping .....that shit spread like wild fire. Cut off & discard all the dead matter, if it's green it still can be dried & smoked. Nice buds!!!