I suppose JediKirby was kinda right.. it seems to be a "brown widdow" which is a species of black widow..
The brown widow is highly variable in color. It may be almost white to almost black. Typically, it is a light to medium brown, with an orange hourglass marking on the underside of the abdomen. The leg segments are banded, with one half of each segment lighter in color than the other half. The back often has a row of white spots (rarely orange or light blue), and there are a few white stripes on each side. Dark individuals lack these markings and are difficult to distinguish from black widows. If an eggsac is present, this is the best identifying characteristic. Brown widow eggsacs are tan, spherical, and have many small tufts of silk sticking out from them. They resemble a 'sandspur.' The other widows make white, smooth eggsacs that tend to be pear-shaped. The brown widow is an extremely timid spider which has rarely been reported to bite. However, it is an introduced species and is the most human-adapted of the species occurring in Florida. Its webs may occur anywhere there is sufficient space to make one. It may be extremely abundant on houses and other man-made structures (e.g., barns, fences, guard rails, bridges). It reproduces frequently and disperses rapidly, making it nearly impossible to eat.