Just a note; you have to remember that when the temp. goes down, it becomes harder to hold humidity. So, for example, (just as a reference) if you have air at -40 (I know it's a rediculous temp, it's just for an example here) and the humidity is at 70%, if you brought that exact same air up in temp to 70 degrees F, it would read a lot less humidity. It would most likely read in the 20-30% humidity range. The reason for this is that the cold air can only retain so much moisture, where warmer air can suspend a lot more moisture before it needs to drop out.
So, to kind of tie up this rambling, if you have 55 degree air in your humi, it's not a horrible thing, but it will be deceiving with humidity because it will not be able to suspend the same amount of moisture. This temperature is so close that I wouldn't worry, but I personally (not like I am an expert here, just another enthusiast) might bring that humidity up a couple points just in case to 67 %.
Just my opinion
Congrats on your walk in !!