Hi -
I've visited twice in September - both times we left the Saturday before Labor Day and stayed for 9 days. I found it to be pretty hot and it did rain probably 3 or 4 days, but usually only for an hour or so. The crowds were light, but I went last year January 12-19th and the crowds were probably half of what I experienced in September. The only down side to January is iffy weather. Last year, we were lucky, it was in the 70's each day and the day we left it was 80. I'm leaving again in one week (yeah!) and am a little concerned about the temperature forecast. I won't worry too much, because right now it's about 5 degrees and snowing here on Long Island and the highs are only going to be in the 20's all week here. So 60's will feel like summertime!