Fabric weight, body temperature, and environment balance in NYC

Originally Posted by Xenon 

Ah kindred folk.
This is a real pain for me as well because it appears that most people in northern climats (Canada at least) are complete wusses. Whenever it isn't stinking hot outside then it is stinking hot indoors and especially public transit (which I flipping hate with a vengence).
As such my suiting ranges almost exclusively from feather weight tropicals(5 oz) upto a maximum of heavy weight summer or 4 season (8 oz). The only exception to this rule are suitings I literally fall in love with such as heavier wieght cashmeres or very high super wools which only get worn in what others would call brutally cold weather.
It's also important to wear a summer weight shirt as well all year round. And an under shirt is completely totally out of the question. In mid summer I can't even wear a jacket. The jacket comes on in early fall. In late fall it's jacket and a vest (when 3 piece suit) or jacket and a light trench coat with which you can go upto freezing weather or rain. Below freezing it's just the jacket and a thinnish overcoat such as cashmere which is still very warm. Basically everything is light weight and comes off easily in transit. For instance on the bus I am down to my shirt with rolled up sleeves and same for office.
Some of the suitings I hear folk talk about such as 11 oz is totally insane unless you were born in saharan Africa and now find yourself in Siberia. Hell even my african born friend finds most native northerners complete wimps.