Measuring Humidity in your Cannabis Storage: A Complete Guide

As a cannabis enthusiast, one of the most important aspects of storing your favorite strains is ensuring proper humidity levels are maintained. However, for many, the concept of humidity control can be confusing and intimidating. With the wide range of overlapping information, it’s hard to know where to start. But fear not! This article will guide you through the process of measuring humidity in your cannabis storage and offer some best practices for to help optimize the quality of your stash. So, put down that old-fashioned humidity gauge and let’s dive into the world of modern humidity measurement tools!

Why is Humidity Control Important for Cannabis Storage?


Proper humidity control is essential for the storage of cannabis. The correct range of humidity levels needs to be maintained to keep your cannabis fresh, flavorful and fragrant for the long term. If you keep your cannabis in an environment that has too little humidity, it can become too dry and lose its potency. On the other hand, too much humidity can encourage the growth of mold and mildew, which can be extremely dangerous to health, particularly when it is smoked or ingested. In addition to this, fluctuations in the humidity of the room can cause the trichomes, the resinous glands that contain the active ingredients in cannabis, to break off or rupture, thereby reducing the potency and effectiveness of your product. It is therefore important to understand how to measure humidity in your cannabis storage and how to maintain the correct humidity levels so that you can keep your product fresh and safe to use.

Humidity Measurement Tools

Measuring humidity in your cannabis storage is essential to ensure that the environment is suitable for preserving the optimum quality of your cannabis. To accurately measure humidity levels, you will need specialized tools that provide accurate readings.

One of the most commonly used and affordable tools for measuring humidity is a hygrometer. A hygrometer works by measuring the water vapor in the air to determine the humidity level. They can be purchased as stand-alone devices or as part of a larger environmental monitoring system. Many digital hygrometers also feature built-in thermometers which provide readings of the ambient temperature, which is also important for maintaining optimal storage conditions.

Another popular tool for measuring humidity is the humidity indicator card. Humidity indicator cards provide a quick and easy way to monitor humidity levels in your cannabis storage containers or bags. These cards feature a small window with color-changing spots that indicate the humidity level. These cards are usually available in packets of multiple cards.

Data loggers or environmental monitors are another option for accurately measuring humidity levels in your cannabis storage. These monitoring devices continuously measure and record temperature and humidity levels, allowing you to monitor the storage conditions over time. This data can be useful for identifying potential issues with your storage environment and making adjustments accordingly.

No matter which tool you choose, it’s important to ensure that it is accurate and calibrated correctly before use. Inaccurate readings can result in improper storage conditions and ultimately result in the loss of quality in your cannabis.

How to Measure Humidity in Your Cannabis Storage

To measure the humidity in your cannabis storage, you will need a hygrometer. A hygrometer is an instrument used to measure humidity in the air. There are two types of hygrometers – analog and digital. Both types are effective for measuring humidity in cannabis storage, but digital hygrometers are more accurate and easier to read.

To use a hygrometer, place it inside your cannabis storage container, ensuring that it is not touching the buds. Leave it inside for at least 24 hours to give it time to acclimate to the environment. After 24 hours, remove the hygrometer and check the reading.

The ideal humidity level for cannabis storage is between 55% and 62%. If the humidity level is lower than 55%, the buds will dry out and lose potency. If the humidity level is higher than 62%, it can promote the growth of mold and mildew, which can ruin the entire batch of cannabis.

If your hygrometer reading shows a level outside of the ideal range, you can take steps to adjust the humidity. If the humidity level is too low, you can add moisture to the container by using a humidifying device, such as a humidity pack. If the humidity level is too high, you can remove excess moisture from the container by using a dehumidifying device or by temporarily leaving the container open to allow for air exchange.

It’s important to note that while a hygrometer is a helpful tool for measuring humidity, it’s not foolproof. Make sure to visually inspect your cannabis buds regularly for signs of mold, mildew, or other issues, and adjust the humidity as needed to maintain optimal storage conditions.

Best Practices for Humidity Control

To ensure the quality and potency of your cannabis, it is crucial to have proper humidity control in your storage. Here are some best practices for humidity control:

Use a hygrometer: Measuring humidity with a hygrometer is the most accurate way to ensure that it remains within the appropriate range of 59-63%. Make sure to recalibrate your hygrometer regularly to keep it accurate.

Keep a consistent temperature: Temperature can greatly affect humidity levels. Keep your storage at a consistent temperature, ideally between 60-70°F or 16-21°C to maintain a consistent humidity level.

Store in airtight containers: Airtight containers prevent the exchange of air and moisture, thus ensuring consistent humidity levels within the container. Avoid using plastic bags as they can create a static charge that can damage trichomes.

Burp your containers: Burping or opening your containers for a short period each day can help release any excess moisture and maintain appropriate humidity. However, be careful not to “over burp” as this can cause moisture loss and affect the potency of your cannabis.

Use humidity packs: Humidity packs can help maintain consistent humidity levels within your containers. Most packs come in 58-62% ranges that are ideal for cannabis storage. Make sure to replace them regularly as they lose their effectiveness over time.

By following these best practices, you can ensure that your cannabis is properly stored and maintains its quality and effectiveness over time.


Properly measuring and controlling the humidity in your cannabis storage is crucial for preserving its quality and potency over time. By using a reliable hygrometer and following best practices such as keeping the storage environment sealed and maintaining a consistent temperature, you can ensure that your cannabis stays fresh and flavorful for longer.

It’s important to note that different strains may have different optimal humidity levels, so it’s worth doing some research on the specific strain you’re storing to determine the ideal humidity range. Additionally, it may take some trial and error to find the perfect balance of humidity and temperature for your storage setup.

Remember that overly humid conditions can lead to mold growth and other issues, while too dry conditions can cause the cannabis to become brittle or lose potency. Taking the time to measure and monitor the humidity in your storage space can pay off in the long run with a better smoking or vaping experience.

Investing in a quality hygrometer and taking a proactive approach to humidity control is a small but important step towards maintaining the quality of your cannabis over time. By following the steps outlined above and using common sense when it comes to storage conditions, you can ensure that your herb stays fresh and enjoyable for weeks, months, or even years to come.

Frequently Asked Questions

What is the ideal humidity range for cannabis storage?

The ideal humidity range for cannabis storage is between 59-63% relative humidity.

What happens if humidity levels are too high?

If humidity levels are too high, it can lead to mold growth and spoilage of the cannabis.

What happens if humidity levels are too low?

If humidity levels are too low, it can cause the cannabis to become dry and lose potency.

What type of hygrometer is best for measuring humidity in cannabis storage?

A digital hygrometer with a remote probe is best for measuring humidity in cannabis storage as it provides accurate readings without disturbing the environment.

Should I measure humidity levels in my cannabis storage at the top or bottom of the container?

It is recommended to measure humidity levels in the middle of the container as it will give a more accurate reading of the overall environment.

Do I need to calibrate my hygrometer?

Yes, it is recommended to calibrate your hygrometer every few months to ensure accurate readings.

Should I store my cannabis in an airtight container?

Yes, storing cannabis in an airtight container will help maintain proper humidity levels and prevent outside air from affecting the environment.

Can I use a boveda pack to control humidity levels in my cannabis storage?

Yes, boveda packs are a great option for controlling humidity levels in cannabis storage as they release or absorb moisture as needed.

Should I keep my cannabis storage container in a cool or warm location?

It is best to keep your cannabis storage container in a cool, dark location away from direct sunlight and heat sources.

How often should I check the humidity levels in my cannabis storage?

It is recommended to check humidity levels in cannabis storage at least once a week to ensure proper moisture levels are maintained.


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