Okeechobee hosts 1 festival in this guide, in Florida: Okeechobee Music & Arts Festival.
Okeechobee has 1 festival in this guide. They run in March, and festival-day temperatures range from 28°C (82°F) to 28°C (82°F), with nights down to 16°C (61°F). That range is the reason there is no single "Okeechobee festival outfit". The answer changes by month and by site.
Every one of them runs in real heat (28°C or more), where loose natural fabrics beat coverage and a brimmed hat does more than any garment.
The ground matters as much as the sky. Every festival here is on open field, which puts broken-in trainers or a low boot at the top of the list for most of these events. 1 of the 1 has camping on site, so outfits have to survive living in a bag on the ground for several days.
Stylistically the crowd here leans boho, camping, psy and tropical. Okeechobee Music & Arts Festival is the largest of them at around 30,000 people, and it sets the tone the smaller ones react to. None of that is a dress code. It is what you will see, which is worth knowing if you would rather blend in or deliberately not.
