What Record High Humidity Means for Your Commercial Property

This summer hasn’t just been hot—it’s been historically muggy. Across the eastern United States, June and July 2025 brought the highest humidity levels ever recorded since measurements began in 1950. Dew points east of the Rockies averaged over 66°F, making this the stickiest summer on record for more than 70 million Americans. (Source: Fox 8) 

Over half of the United States saw record numbers of days with average daily dew points of 65°F or higher. In several major cities dew points averaged six degrees above the 1951–2020 normal. Some areas even experienced tropical-like conditions, with peak dew points nearing 75°F for hours at a time. (Source: Fox 8) 

Humidity didn’t let up overnight, either. Cities like Raleigh, Charlotte, Nashville, Virginia Beach, and Wilmington set records for the hottest overnight lows. The lack of nighttime cooling meant many homes and buildings never fully dried out from the day’s heat. (Source: Fox 8) 

Meteorologists explain that higher temperatures allow the atmosphere to hold more moisture—about 4% more for every degree Fahrenheit it warms. This feedback loop of heat and humidity creates not only uncomfortable conditions outside, but also serious risks inside your home or business. 

High humidity is one of the main factors that allow mold to grow. When indoor relative humidity stays above 60%, moisture builds up on surfaces, inside walls, and within HVAC systems. In warm conditions, mold can begin developing in as little as 24–48 hours. Prolonged dampness also weakens drywall, flooring, and wooden framing, which can lead to costly structural repairs. 

This year’s record-breaking mugginess has increased the chances of hidden moisture damage across the region. Condensation from humid air often forms on cooler surfaces like windows, pipes, and ductwork, providing the perfect breeding ground for mold. Left unchecked, these issues can compromise indoor air quality and even cause health problems. 

At Sasser Restoration, we specialize in protecting properties from the impacts of high humidity. Our mold remediation services remove active growth, sanitize affected areas, and address the root cause to prevent it from returning. We use industrial-grade drying and dehumidification equipment to bring moisture levels back to safe ranges. Our team can also assess your HVAC and ventilation systems to make sure they’re keeping humidity under control year-round.  

Want to add an extra layer of protection to your property? Call our team to learn more about Sasser Restoration’s crawlspace encapsulation services.  

 Summer 2025’s extreme humidity may go down in the weather history books, but it doesn’t have to spell trouble for your property. If you’ve noticed musty odors, condensation, or lingering dampness in your home or business, now is the time to act. Sasser Restoration is here to respond quickly and protect your property before a small moisture problem turns into a major restoration project.