There are a couple of mods that address the issue of the thermostat.
This one is by LittleMsSam where it makes all thermostats automatically adjust to the temperature. In the playable home, your sim will need to pay 699 semolians (only on played lots) all other lots it will automatically turn on and off according to the temperature. This is really nice when it comes to community lots.
https://littlemssam.tumblr.com/post/180789371643/automatic-thermostat-seasons-this-mod-will-let
This mod your sim will automatically change into their everyday outfits when they are indoors. You can read more about it in the section called Seasons DLC.
https://littlemssam.tumblr.com/post/175412396783/random-small-mods-sometimes-mods-are-sooo-small