So in general, regarding perishable foods like meat, most dairy, unshelled eggs and shell eggs (in the US) , cooked casseroles, and so on: if the food (or its perishable components) have been at room temperature for more than two hours, you should discard that food.
This directly effects how comfortable it will feel outside. Many times, relative humidity can be misleading. For example, a temperature of 30 and a dew point of 30 will give you a relative humidity of 100%, but a temperature of 80 and a dew point of 60 produces a relative humidity of 50%.
I've lived most of my life in the beautiful (but humid summer) east coast and in the south (Houston), and for lesser periods in western Oregon and southern/coastal California. Let me tell ya, any humidity in the summers of western Washington/Oregon is NOTHING compared to the summer humidity of the south and east coast. The people of southern California would sometimes about some summer humidity (with highs in the upper 70s), and i just laughed inside myself .