This is what i just found on the meguiars link pasted by Margallar, thanks for the info and i always feel elevated and happier on increasing my knowledge:
The simple explanation of moisture in the air, or more specifically, the amount of moisture in the air is the major factor, which will affect how easily or potentially difficult a product will be to work with, or a procedure will be to perform.
Low humidity, in warm to hot temperatures, will act to cause liquids to evaporate and dry more quickly. This can make a product difficult to work with or decrease the amount of time the product remains easily workable on the surface.
High humidity in cold temperatures can make products hard to work because it can dramatically increase the amount of time necessary for the product to cure, dry or haze (depending on which product your using).
Low humidity in low temperatures tends not to be a factor in working with, cure times, and when applying and in the removal of cleaners, polishes, and protectants (Low temperatures are a factor, but not low humidity in low temperatures).
High humidity in high temperatures tends not to be a factor in working with, cure times, and when applying and in the removal of cleaners, polishes, and protectants (High temperatures are a factor, but not high humidity in high temperatures)
Extreme temperatures, both cold and hot will make any product more difficult to work with.
