Hi there, Jaime!
My absolute favorite time to visit Disney is from mid-January through mid-February - from just after Marathon Weekend until just before President's Day weekend starts.
With most children back in school just after Winter Breaks, crowds are much lighter than average and the weather is picture-perfect. The average low temperature is around 50F, while the highs tend to top out, on average, at around 70F.
That time of the year is considered "Value Season" at Walt Disney World, and Resort rooms can be had at great discounts. The free Disney Dining Plan is occasionally offered in January (2011 and 2012 saw that promotion made available to Guests!), and that, combined with lower room rates, can make for a very tempting vacation time. Watch the
Disney Parks Blog for the most up-to-date information on those specials!
If I can be of any help as you consider a 2013 winter trip to the Most Magical Place on Earth, please let me know!
See you later, celebrator,
-Deborah B.