For Florida any hardshell rainjacket is going to be way too much. Try a Montane featherlight windshirt. Mine weighs 4 oz's and packs as small as an orange. Mine is called a Montane Marathon, made for joggers, they also make a cyclign version, both work fine. Rain resistant, not waterproof. As long as your pedaling and generating heat, it'll keep you good in all but a an hour long downpour.