Comfort is the baseline
There is no universal thermostat number that guarantees better sleep. The useful goal is a room that feels comfortably cool and stable for you, with breathable bedding that suits the season.
Change one variable
Try adjusting a layer, opening or closing a door, or changing the bedding weight for several nights. One change at a time makes it easier to learn what genuinely helps.
Think beyond the thermostat
Airflow, sunlight, humidity, noise, and bedding all change how a room feels. A modest environmental adjustment can be more useful than a complicated upgrade.
