Why do I sweat at night even though my AC is on?

Posted: August 26, 2023 at 10:35 am
By: Lakes Region HVAC

If you are struggling to stay cool and comfortable at night, you're not alone. Being a "hot sleeper" is thought to affect 10% to 41% of people. Sweating at night can be frustrating, especially if your AC is on full blast. However, sometimes cranking up the air conditioner is not the only, or best, answer (especially if you're trying to save money). There are other potential solutions to help improve your sleep quality.

The Hot Sleeper's Checklist

Find the Correct Temperature Setting

The best room temperature for sleep is approximately 65° F. Start by using this temperature and adjusting as needed. Doctors recommend keeping the thermostat set between 60 and 68° F. So play around with these temperatures; in a week, you should have found your ideal temperature and be able to sleep more comfortably.

Measure Your Bedroom's Humidity Levels

High humidity levels make the room feel warmer and can lead to excessive sweating. By purchasing a hygrometer, you can check to see if your sleeping space's humidity is within the ideal range. Keeping humidity levels between 30-50% is optimal for comfort and prevents mold and bacteria growth as well.

Try Adding a Fan

Moving air causes us to feel cooler. By placing a fan in the bedroom, you may find that you're more comfortable without needing to adjust the thermostat.

Stay Hydrated

By hydrating throughout the day, your body will more easily regulate its temperature at night. However, avoid overhydrating right before bed to prevent sleep disruptions.

Buy New Bedding and Sleepwear

Opt for bedding and pajamas made from bamboo, eucalyptus, linen, microfiber, and cotton with a percale finish. These materials are breathable and moisture-wicking, keeping you cool throughout the night. Many products, such as pillows and bed pads, come gel-infused. The gel is designed to keep sleepers cool and may benefit hot sleepers.

Assess Your Nighttime Routine

The two to three hours before you fall asleep should be relaxing. Avoid intense exercise or stressful activities. Adrenaline causes sweating and may cause overheating at night if experienced too close to bedtime. Incorporate calming evening activities into your routine, such as meditation, reading a book, drinking decaffeinated tea, or stretching. A cool shower (not cold, which is energizing) will also help bring your body temperature down before you hop into bed.

Invest in Blackout Curtains

Especially during the summer when the sun is setting later, solar heat has a lot of time to build up in a room exposed to sunlight. You can prevent heat absorption in the air and bedding by keeping as much light out of your bedroom during the day.

Consult a Doctor

You may have an underlying medical condition if you're still struggling to stay cool at night. Your doctor can assess whether hormonal imbalances, sleep disorders, or other illnesses may be the cause of your nighttime sweats.