Grew up in a house with no AC in the summer. Would easily hit high 80s inside during the day and hover in the lower 80s or high 70s at night.

You learn how to deal with it. Use fans to bring cooler air in at night. Close up windows and curtains (especially south-facing blinds) during the day. Hydrate frequently. At night, strip down as far as comfortable, use just a sheet instead of a blanket, and have a fan to circulate air. AC is a relatively new invention, people have been living longer in hotter areas without it. 78 degrees should literally be “no sweat”.

Yes, 65F for the winter or lower, I hate the heater, and yes, 78F in summer, the heat pump struggles and it’s plenty cool enough, feels cool compared to outside.

ETA I grew up in Florida without air conditioning. No central air until I was 24, sometimes window units. And at school no air conditioning till 7th grade and they kept it fucking FREEZING in that school so you would be going always from hot outside to so cold inside, it was worse than none.

People absolutely can adapt to the humidity and heat but buildings do not, they hold up so much better with the central air drying them out.

80 in summer during the day, 75 at night, 78 day and night in winter. We do not have heat, and 78 is required for the air conditioning to run periodically in winter to dehumidify the house.

Florida keys

Heat to 69 in the winter, cool to 74-76 in the summer.

72°F in summer / 64°F in winter

21 during the day and at bedtime 15

Here’s January of this year. San Francisco, so pretty moderate weather — typically don’t run heat during the day, and low 60s at night (if at all) during the winter. Large temperature gradient throughout house, typically.

South facing windows gives kitchen and living room a greenhouse effect, particularly in the winter, hence the large daily temperature swings:

74F in the winter. In the summer I usually leave the A/C off and use fans, but if it gets above 90F I’ll let it run for a few hours before bed.

I seriously don’t understand how people farther north of me survive the cold. And I live in Atlanta, so there’s a lot of them.

I agree that 78°F is way too high to be a confortable sleeping temp, though being in a country where residential AC isn’t really a thing and inside temps at night often are higher than that in summer… you get used to it, it’ll just never be fun.

My ideal sleeping temp is like 15°C but even if I had AC that seems too wasteful so I’d probably settle for 18-20

78

I live in California’s San Joaquin valley. It gets hot in the summer. PG&E bill is high as hell. Having your place cooler than 78F is a total luxury. In my place keeping it at 78F would mean a couple $600 bills. I have since gotten solar but I’ve heard PG&E increased their prices twice since then. And they want to increase it even more.

On the other hand some places like Sacramento used to have super cheap rates and people could crank their ACs on.

Cool to 25, heat to 20 (Canberra, Australia)

23 in a lot of the winter (though I think the thermostat is wrong since that gets us to 20.x or 21 according to actual thermometers in the room) and usually 26 in ‘dry’ mode in the summer. Right now, we’re going for days without using them at all but, if not the heat, then the humidity will put an end to that by late May or early June.

70F, all year round. Cuz that’s basically the perfect “room temperature.”

I do 69 in winter because its close enough to what I want and funny. summer it depends on humidity. I often just keep it a bit below the temp outside because if you draw away humidity even low eighties is not bad.