I rode the Keys twice, once in 2017 and again in 2022. It was May and the weather was good with a little rain. The ride was on roads and bike paths. Generally the bike paths were good but several ended with warning pushing me on the roads. The drivers were accommodating especially on the 7 Mile Bridge.
https://www.texbiker.net/blog/2022/0...-florida-keys/
https://www.texbiker.net/blog/2022/0...ring-key-west/
https://www.texbiker.net/blog/2017/0...-fl-bike-ride/
https://www.texbiker.net/blog/2017/0...-fl-bike-ride/