most likely it's the valve stem seals going weak, nothing uncommon.
I had this problem in past with '00 solara (white bluish puff of smoke on every cold start also in Summer) ... but somehow miraculously the issue went away on its own after I switched it to synthetic oils and sea foamed ( I also replaced spark plugs & wires at that time) ... don't ask me how, but it's not doing it anymore..
don't get it confused with white smoke in terms of steam in high humidity climates (no bluish tint to smoke).
also in Winter almost all cars (always wondering why not all of them) produce visible white "smoke" because of temperature difference, but that would rather be steam too
if you have a coolant leak into engine oil (minor HG issue), then the smoke will be white like snow and will have a sweet distinct smell (coolant). most likely it would not disappear after warm up but rather stay more or less all the time.