I doubt this is really much of an issue. We have members here using lasers in all sorts of environments, including hot, high humidity. Humidity should not be that important, wether or not it is condensing is. When first starting up for the day you would want to run the blower for enough time to stabilize the temperature of the machine, after that you should be good to go.
There are probably some extreme cases where you would have to take extra steps, like not using the outside air system for the day, but for the vast majority it would work out fine.
*note that I have Chinese machines in mind for all these opinions. Western style machines with air cooled tubes may be more sensitive, or at the minimum piping in outside air would probably void a warranty.