What Humidity Level Does Mold Grow in New York?

How can you prevent mold from growing? The answer is controlling humidity levels. Any humidity level greater than 55 percent is enough for mold to grow.

Ensuring your home has excellent indoor humidity levels and proper ventilation is critical to prevent mold from growing and returning. As you continue reading below, we’ll discuss the levels of humidity needed for mold to grow, factors that help mold grow, and the impacts humidity has on mold.

What Humidity Level Does Mold Grow in New York?

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What Humidity Level Does Mold Grow?

When you have an area that has high humidity, it’s always susceptible to mold. Any humidity level greater than 55 percent is enough for mold to grow. Due to HVAC systems and indoor temperatures, humidity levels can constantly fluctuate.

While indoors, humidity levels can vary from room to room, so you should monitor each area & room separately. Multiple factors can lead to high humidity in your home and mold growth. Let’s take a look at these factors below. 

Factors that Help Mold Grow?

High Humidity

Many types of mold thrive with high humidity. When humidity levels stay high for a few weeks, this provides mold with a great environment to thrive. Humidity levels need to be around 55 percent or higher before mold grows. 

You can control humidity levels through good ventilation and/or a dehumidifier. In addition, an excellent way to notice high condensation levels in your home is to check if you have moisture on your windows. 

Constant Moisture

To help mold grow, it needs constant moisture and high humidity. When mold spores come into contact with a wet surface, they will plant and grow. The three main things mold needs are moisture, nutrients, and time to develop.

Once the mold spores find a dark and wet space in your home, they will begin to spread. 

Hot Temperatures

Homes are the perfect environment for mold growth since temperatures fluctuate often. For mold to thrive, it likes hot temperatures, which can happen more in bathrooms or during warm summer months. Most types of mold need a consistent temperature of around 70 degrees to thrive.

You can control and prevent mold growth by regulating your home’s temperature.


Like all living things, mold also needs oxygen to maintain life and grow. Even the slightest bit of oxygen will help mold grow. This factor is difficult to control when preventing mold; however, you can use a sealant to eliminate oxygenation. 

Food Source

A good food source will allow mold to thrive and spread. When we mention a food source, we talk about organic matter, such as walls, ceilings, and doors. Typically any organic matter is made from organic substances for mold to thrive.

What Humidity Level Does Mold Grow: The Impacts of Humidity

As mentioned earlier, mold needs humidity levels of around 55 percent or more to thrive. Since humidity levels can fluctuate with each room, this can bring concern when dealing with mold. You can find high humidity levels in kitchens, bathrooms, and laundry rooms where much water is present.

By identifying areas in your home experiencing high humidity levels, you can determine which rooms to address. Another common place mold thrives in basements because they’re dark and often have moisture. Typically, your basement humidity levels should be between 30 and 50 percent to prevent mold; if you have higher levels, this can lead to mold growth.

While mold thrives in warm locations, it can grow when warm and cool air are combined. Combining warm and cool air can create water vapor, adding humidity for mold to grow. Many fungi grow between 60 and 80 degrees, the typical temperature most homeowners keep on their own.

Mold cannot thrive at temperatures below 60 degrees or above 80 degrees. However, it can still grow outside these temperatures when other factors are present. This factor makes knowing what exact temperature can kill off the mold challenging. 

In addition, when you have direct sunlight in an area, it can help prevent and stop mold from growing. Exposing areas to direct sunlight can help when stopping decay in its tracks. 

Ways to Prevent and Control Mold Growth

Removing mold can seem like a stressful process; however, there are ways you can prevent and control mold growth in your home. 

Proper Ventilation

For proper ventilation in your home, try keeping your windows open more often when possible to keep the air circulating. Adequate ventilation can help keep mold from getting into the air and forming inside your home.

Keep Areas and Objects Dry

Another way to prevent and control mold growth is to ensure areas in your home and objects such as clothing are dry. To keep areas dry, this also includes spills on the floors of your home, especially rooms with carpet. Most importantly, check for wall leaks and fix any plumbing issues.

Control the Temperature

For mold to thrive, it must reach the ideal temperature to grow. During the hot summer months, temperatures are higher, which can cause the inside of your home to become warmer. Ensure you’re keeping the temperatures inside of your home at a low level during the summer. 

As a homeowner, you should be aware of the temperature in your home. If you are away from your home for an extended time, keep your home’s temperature low and comfortable.

Why You Should Choose Exit Mold for Mold Remediation

As you may already know, mold is a fungus that needs high humidity and moisture to grow. It can ruin the grout in your shower, discolor your walls, cause black spots to form on walls, and thrive on wet areas. When your home has mold growth, this can cause structural damage to your home.

To keep your home safe, mold remediation is necessary by a team of trained professionals. At Exit Mold, our experts can effectively remove mold and prevent it from returning. Our mold remediation process includes the following:

  • Mold Detection
  • Mold Remediation
  • Mold Prevention
  • Odor removal

If you need to schedule a mold remediation, contact us today to schedule an in-home inspection

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