How to Keep Your Home Cooler During the Summer in Lewisville, TX

Bill Grote

Jul 09 2026 15:00

Summer in North Texas can be relentless, and when temperatures push toward triple digits, keeping your home cool becomes a real challenge. Many homeowners across Lewisville, Flower Mound, Coppell, and the surrounding areas notice their AC systems running longer, energy bills creeping up, and certain rooms feeling noticeably warmer. Most of the time, the problem isn’t your thermostat—it’s the amount of heat entering your home.

At Select Air Conditioning & Heating, we know how tough North Texas summers can be. A few strategic changes can help reduce heat gain, improve airflow, and give your HVAC system a much-needed break.

Block Heat Before It Enters Your Home

One of the easiest ways to stay comfortable is to stop heat from getting inside in the first place. Sunlight streaming through windows quickly warms interior spaces—especially south- and west-facing rooms common in Lewisville and the greater North Dallas area.

Closing blinds or curtains during peak sunlight hours helps reduce indoor heat. Even light-colored window coverings block radiant warmth and keep rooms cooler. This reduces strain on your air conditioner and can help lower energy bills during the hottest parts of the day.

Add Shade Around Your Property

Exterior heat gain is another major contributor to indoor discomfort. Sun hitting exterior walls, patios, and surrounding concrete can radiate heat directly into your home.

Homeowners in Lewisville, TX often benefit from planting shade trees, installing awnings, or adding shade structures on sun-exposed sides of the property. Keeping these exterior surfaces cooler helps maintain more stable indoor temperatures and reduces the workload on your AC system.

Limit Heat From Appliances and Lighting

Indoor heat sources matter too. Ovens, stovetops, and dryers add unnecessary warmth during the hottest parts of the day. Running these appliances in the evening, when outdoor temperatures dip, helps prevent indoor heat buildup.

Traditional bulbs also generate more heat than many people realize. Switching to LED lighting is an easy way to lower energy use and reduce indoor warmth.

Improve Airflow With Nighttime Ventilation

North Texas evenings often bring cooler air—use it to your advantage. Opening windows in the early morning or late evening lets warm indoor air escape and cooler air flow in.

Creating cross-ventilation by opening windows on opposite sides of your home improves airflow and helps release heat trapped in walls and furniture. This simple step can delay how quickly your home heats up the next day.

Use Fans to Keep Air Moving

Fans are an inexpensive and effective way to support your AC system. When temperatures drop at night, fans help pull in cooler outdoor air and push warmer air up and out through attic vents.

Ceiling fans, box fans, and portable fans—all help circulate air more evenly throughout your home. This reduces hot spots and may help lower your reliance on air conditioning during evening hours.

Manage Humidity for Better Comfort

High humidity makes indoor air feel warmer and heavier, a common issue during Lewisville’s hot summer months. Lowering humidity levels improves comfort without adjusting the thermostat.

A portable or whole-home dehumidifier can make a big difference. Lower humidity also helps your air conditioner run more efficiently.

Small Adjustments Make a Big Difference

Keeping your home cool in the summer is often about combining several small—and effective—steps. Blocking sunlight, adding shade, limiting heat from appliances, improving airflow, and managing humidity all help reduce indoor temperature swings.

These tips can significantly improve comfort, but they aren’t a substitute for a properly functioning HVAC system. If your AC is running constantly, struggling to cool, or showing signs of trouble, it may be time to call a professional.

At Select Air Conditioning & Heating, we’re here to help homeowners across Lewisville, TX and the North Dallas suburbs stay cool all summer long. Whether you need AC repair, a seasonal tune-up, system replacement, or help improving your home’s efficiency, our local team has you covered.