Tonight, according to the national weather service: "A FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 7 AM EDT TUESDAY." So I put together an impromptu garden covering to hopefully reduce the number of plants I need to replace this week. This officially confirms that I moved the tomatoes and squash out too early. Fortunately, I have extras of everything so it will not end up being a tragic mistake, even if my covering doesn't work.
After tonight, the weather is supposed to go into the 70's for the rest of the week. If my plants survive the night, this should be a great week for growing.