March-- esp early March-- is very iffy... We went last year 3/5-3/12 and really lucked out! I wore capris and a t shirt everyday, and always had a zippered sweatshirt with me. The mornings and early evenings when the sun when down were chilly. At night I changed into jeans and a sweatshirt. Keep checking accuweather.com as your trip comes closer, and plan on bringing a little of everything. DH wore shorts some days too.
Tinkerbell6-- did you go the same week as me?? We had one day of rain also, and it was really chilly that day... I think it was a Wednesday.