We were at Disney I think it was in 98 or 99 end of April beginning of May. Weather was Hot, Hot, Hot high 90's for 3 days, then it turned cold, how cold low 50's and windy. They even closed the WP that cold day. Two days later it was high 90's again. As Forest Gump would say "Disney like a box of chocolate's you never know what you'll get"
Check the weather before you go. That way you will have an idea on what to expect during your stay.