I understand during winter and autumn/spring months it would have been normal to wear more clothing and the temperature would have been bearable, but I can’t understand how men wore full suits with ties in the summer and women wore full dresses. Wouldn’t they have been boiling under these garments and continually sweating? If you look at photos of summer now and back then you will see how modern day people are content wearing just a t-shirt and shorts and in the same environment 70 years ago they were wearing everything.
This thread from /u/chocolatepotmay may help
See the answers by /u/mimicofmodes, /u/kittydentures and /u/colevintage linked in How could people before WW2 dress so heavy, even in summer? Note that mimicofmodes was once called chocolatepot.