no.... not quite that simple.. i have several different winter gloves i've tried (PI amfib claws among them.... supposed to be such warm gloves)... i've worn thermals and sweatshirts and heavy jerseys.. nope... can't get/stay warm.... i wear/have worn more on 50 degree bike rides than some people wear up in canada or other cold climates.. and i still freeze my arse off!!!!!!!!!!

as for riding in the heat.... once you get a little sweat on you and the evaporative cooling effect kicks in.... it's all good!