score:6
While not having direct experience from Central America but rather central Asia, such as rainforests in Indonesia where the humidity also easily surpasses 90%, I can tell you that you do not need to worry.
I never had an issue and I hardly ever use air conditioning, be it with cameras, laptops or cellphones etc.
If you want to be extra sure take silica gel packs and a large ziplock bag with you.
Upvote:2
Having spent years upon years through monsoons in India.. Laptops will not get spoilt.
However, I have heard of cases where people who lived in beach facing apartments faced faster corrosion of their electronics, but these were older electronics like amplifiers / equalizers.
Given todays electronics manufacturing (boards coated with some resistant stuff), especially laptops, I doubt if this will be an issue.