The weather in Orlando can be rough for those with low heat tolerance. The humidity is high, the dew point is in the 70s most of the time (anything above 75 is unbearable for most humans). Wearing loose fitting, light clothing (read: thin cloth, no wool, no double knit) helps. Professional office attire is uncomfortable and you may find a more relaxed dress code than in Northern states. Staying indoors during the hottest parts of the day (noon - 5pm) helps. You can get used to it - many do. Many people enjoy outdoor water activities - there are many lakes (careful of the alligators), the beaches are less than an hour away, cold springs flow in North Florida, and the tourist areas have water parks with Florida resident prices.
Hurricanes are a big deal here. Fortunately, there is usually a few days of warning, so you can pack up and leave. Some people choose to stay and ride out the storms. If you are risk-adverse, don't do it. No reason to die just to prove a point.
Florida calls itself "The Sunshine State," however the frequent summer thunderstorms will blow you away! Many people are surprised at the lighting and occasional hail during these storms.
The winter is brief and occasionally chilly, due to the humidity and not having thick clothing, which most Florida natives don't have.