How do I stop my room from getting so hot at night?

Keeping a bedroom comfortable and preventing excessive heat buildup during nighttime hours involves managing thermal heat gain and utilizing strategic cooling techniques. Start by drawing your blinds and heavy blackout curtains tightly shut during the late afternoon to block solar radiation from heating up glass and walls. Second, keep windows closed during the hot day, but open them strategically late at night if outdoor temperatures drop below indoor levels to create cross-ventilation. Third, utilize oscillating ceiling fans set to rotate counterclockwise to create a cooling wind-chill effect on your skin, and keep interior bedroom doors propped open to allow air to circulate freely. Fourth, upgrade your bedding to breathable natural fibers like cotton. You can troubleshoot nighttime stuffiness with a room thermometer. You can verify success when sleep comfort improves.