I find February to be very fickle in terms of weather. My two PHMs (14 & 15) have been worlds apart weather wise. And that same week is Massachusetts school vacation week, so I've been there frequently that week since 1986. Weather has generally been nice, but plenty of hot and cold years.
To top it off, for my freshman year I went to college at UCF in Orlando, and it snowed one day, in early February. It was hilarious. No one knew what to do or say. As a New Englander I enjoyed the show.
One thing I always do is actually track myself. There are stories each year about issues with people B-tag not working properly. By tracking myself (I run with my phone for music) I also get a text as I cross the start, 5k, 10k, 15k and finish lines. My thinking is, if anything were to go wrong, I would know and could take care of it right away. It also serves as a back up in the event my GPS watch did something wonky and I couldn't rely on it for my time.
And while we are talking tag issues, make sure your tag is not covered as you cross the start. Particularly if you have a mylar blanket. Last year, it was freezing for the 5k and 10k to start. There were issues where people who had old mylar blankets to keep warm pre race and ran over the start line with it on did not get there start recorded correctly. The mylar interferes with the timing chip. They made announcements at the 10k because lots of people had them from the 5k the day before, but I still saw people wear them over the line.