I would leave them on the plant, but watch the night temperatures. I'm in the mid/south part of the Valley, and it got down to 36Ã‚Âº here last night. According to Accuweather, it looks like we're only going to have 2 or 3 more days this month that might really be able to be called "sunny". And as we all know, chances of sun after the end of this month are pretty much nil.
I recommend that you pick the tomatoes when your daytime temps stay under 60Ã‚Âº. Until then, cover the plants if it looks like the temps might drop below 40Ã‚Âº at night.
Hi, neighbor, and welcome to the forum!
"Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?" - Douglas Adams