It's not the sun that dries it. It's the breeze/wind as my grandpa always says.
And he's right. Even if it's 40F out, the clothes can be dried outside quickly with the breeze/wind.
I have a liner in the laundry room in the basement and I always hang them up and open up the very small window in that room to a crack if it's really cold out to wide open if it's summer time. The moving air around the basement will keep the humidity level quiet low and that dries the wet clothes quickly...usually overnight. But I have no patience to wait for some clothes to dry, so I use the dryer.
I just pile my dirty clothes on a certain spot of the floor. When I'm running of clothes, that's when I know I have to do the laundry and usually it takes two or three weeks for that to happen. I get everything done almost in one load. So I do two or three loads per month. The towel get washed...eh...I dunno, once per month or so?