My family and I are going Dec 7 - 15. This will be our 3rd dec trip in a row...we love, love, love this time of year. Of course I wouldn't rec during Christmas week. We have always had great weather except for last year it got a little chilly a couple of days (jeans and coat weather). We are from PA so we are used to cold weather except when in Disney..then we expect warmth. The decorations are beautiful and the crowds have always been moderately busy.
Hope this helps
Deb