The weather is so unpredictable in FL. I think the most accurate forecasts are from WESH weather based in Orlando, but honestly, they can change by the hour. I wouldn't bother to look at a FL forecast ten days out, or use it to decide if I wanted to buy.
Edited to add that you probably need to be okay with spending some park time in the rain to use your LLs, and or be okay with spending the money and not using them. With that said, you will hopefully be fine, and it will be showers instead of all day rain.