7 Best Hygrometer For Growing Weed in 2024

ThermoPro TP65 Digital Wireless Hygrometer

ThermoPro TP50 Hygrometer and Thermometer

AcuRite 01083 Pro Accuracy Indoor Temperature and Humidity Monitor

When growing any plant, whether outdoors or indoors, different factors impact the plant’s growth. Among these factors include moisture or humidity, which plays an important role in the plant’s health. Knowing this, you have to invest in a device that will help you monitor your grow tent’s humidity or grow room. With that being said, you should get the best, most reliable, and high-quality hygrometer available on the market.

What Is A Hygrometer

A hygrometer is a device that measures the humidity present in the air. They are also able to measure the amount of moisture present in the soil. Purchasing the best hygrometer provides you with a device that can measure the humidity level quickly and accurately.

Water tends to evaporate constantly, and before you know it, your plants are dried up and dehydrated, and I know no one wants that; you can avoid this by keeping close watch over your hygrometer. However, evaporation doesn’t only mean dryness, it also causes the loss of essential nutrients, and this can affect the growth and quality of the buds produced.

When excess water evaporates from a plant, the plant will not be able to absorb new nutrients through its root from the soil; this is why it is important to have a good quality hygrometer; it might just save the life of your cannabis plant.


Various factors should be considered when selecting the best hygrometer, but one of the most vital factors is the type of hygrometer that will best suit your needs. Below are the types of hygrometers that you will have to choose from;

Analog Hygrometers

These hygrometers are also known as mechanical hygrometers; it is a more traditional form of measuring humidity. It looks and functions like a compass. It has a dial that points to the numbers that represent the corresponding humidity level. However, they need to be regularly calibrated to tuned-up. If not, they could feed you inaccurate readings, especially after being used for a long time.

[BEST](Digital Hygrometer)

This is a modern form of the analog hygrometer. They have a screen that shows the humidity level readings; it keeps refreshing every ten seconds. The premium options usually double as a thermometer. They use modern high tech sensors, which is why it isn’t easy to surpass them in their accuracy.

However, hygrometers can also be classified according to their applications. Aside from their use in a greenhouse, they can be used inside the home to measure humidity levels to ensure everyone’s comfort and also inside humidors.


To ease the stress for you and narrow down the o[tions when it comes to choosing the best hygrometer, we have compiled some of the most vital factors that need to be considered.

Consider Your Application

When choosing a hygrometer, you need to think of the features you need in a hygrometer. You have to consider how accurate and precise you need your humidity and temperature level to be in your grow environment. Sometimes you might even need to control the co2 levels in your grow tent and require a device that can give you accurate readings. You need to know the optimum temperature limits for your grow room before using a hygrometer to maintain the humidity and temperature levels. The relative humidity in your grow environment should be in the range of 30 percent to 50 percent at a temperature of 75 degrees Fahrenheit. A humidity level of 40 percent will be suitable.


The first factor you have to take into consideration is the sensor’s accuracy. It is vital that you select one that has an accuracy of 1 to 5 percent. This means that the average readings will be correct.

Ease Of Use

The hygrometer you choose has to be user-friendly. It shouldn’t require any calibration when it is taken out of the box. When it comes to caring and maintaining the hygrometer, it should require little effort from your end. It should feature a large display that is easy to see whether it is might or day.


The majority of hygrometers you will find available on the market these days are made to offer more than one functionality. They are made not only for reading humidity levels but can also be used as a thermometer. In order to get your money’s worth, it is best you pick a model that offers you both features of a hygrometer and a thermometer.

Source Of Power

Batteries power the majority of models you will find on the market. Ensure that you factor in the type of battery used. The best type of batteries to use is Lithium-ion batteries because they last longer.


Not every model of hygrometers will offer you the option of being manually calibrated. Majority of the digital options do not need to be calibrated. However, if the model you purchase needs calibration, ensure you adjust it occasionally in order to make sure the readings remain accurate.

Data Logging

This feature is quite vital to have on your hygrometer; it allows you to read the historical humidity data that the device has recorded. This helps you keep track of any changes in your level or room’s humidity level tent.

Mounting Options

In order to have a versatile device, it is best if you choose a hygrometer that offers you several mounting options. Majority of them come with magnets behind them. There are some models that can be mounted on the wall or placed on top of a stable base.


This factor is important to consider most, especially if you intend on using your hygrometer for outdoor tasks. It should be constructed from premium materials that can withstand different conditions and long term use. If you get one that is made out of inferior materials, it could allow mist to enter the device, thereby rendering the readings unreliable.

Remote Monitoring

The internet is everything in today’s world. Everyone is always busy with a device they carry everywhere. This is the same for a hygrometer with an internet connection. If you own this type of hygrometer, it will allow you to monitor the humidity, and temperature changes in your grow tent from anywhere you are. It helps you prevent irreversible damages to your plants.


Another factor that you have to be on the lookout for when selecting your hygrometer is certification by The National Institute of Standard and Technology (NIST). It will also help you choose an accurate hygrometer because hygrometers certified by NIST is accurate and reliable.

Choosing the right hygrometer for your needs is not the easiest task, especially because of all the options available on the market. To aid the process, we have reviewed the top choices when it comes to hygrometers. Hygrometers can be used for different purposes, but those mentioned in this article are mostly used for outdoor and indoor cultivators.

The Best Hygrometer For Growing Weed Are Reviewed Below

Below is the reviewed list of the best hygrometers for your grow room. We have listed out their specifications and key features to help reduce the workload. All you need to do is match the right hygrometer to your specified need.


ThermoPro TP65 Digital Wireless Hygrometer

This ThermoPro hygrometer has all the important features you need ina good quality hygrometer. It allows you to become a pro at measuring the humidity level in your grow room. It has a 4 inch LCD that ensures you don’t make a mistake while reading it. It also features a backlit touchscreen that lets you easily read the display, even in an area with dim lighting.

This device also doubles as a thermometer; it has arrows that point to show you the humidity level in the air. It has a remote range of 200 ft, thereby allowing you to use it to measure the outdoors’ temperature and humidity levels. AAA batteries power it, and this makes it portable. It also keeps records of the up and downs of your humidity and temperature levels within a period of 24 hours. If you want to reset the hygrometer, all you have to do is press one of the buttons located at the hygrometer’s front. It is easy to use hygrometer that is suitable for first-time users.

Key Features:

  • Backlit touchscreen
  • Wireless humidity and temperature monitor
  • Records maximum and minimum levels for 24 hours
  • Remote range of 200 ft
  • Multiple placement options


  • Brand: ThermoPro
  • Model: ThermoPro TP65 Digital Wireless Hygrometer
  • Weight: 9.2 Ounces
  • Dimensions: 4.3 * 3.3 * 1 inches
  • It is portable
  • It is accurate
  • It is easy to set up
  • Sometimes the magnet holding the hygrometer might be defective


ThermoPro TP50 Hygrometer and Thermometer

The ThermoPro TP50 is a portable, mobile humidity and temperature reader covering a wide range of temperatures compared to other conventional units. It provides you with professional and precise readings of the level of humidity in your grow room and the temperature. Its controller can display the environmental conditions that include the lows and the highs in your grow room.

One of the impressive features of this hygrometer is its large digital digit display. It clearly shows the current temperature, current humidity, comfort level, and maximum and minimum temperature and humidity levels. It has a humidity comfort level that tells you when the room is wet, dry, or normal. It has a humidity accuracy of about +/-2 % from 30 to 80 percent.

Key Features:

  • Humidity meter
  • Level icon
  • A quick refresh and high accuracy
  • Low and high records
  • Powered by 1*AAA battery


  • Brand: ThermoPro
  • Model: ThermoPro TP50 Hygrometer Indoor Thermometer
  • Weight: 2.72 Ounces
  • Dimensions: 3.11 * 0.84 * 2.62 inches
  • It has premium portability
  • It has large digits display for easy readings
  • It displays the daily lows and highs
  • It has multiple mounting options
  • It allows you to achieve maximum optimization with its comfort level indicator
  • Its toggle switch allows you to switch from Fahrenheit to Celsius
  • Sometimes, the unit might be defective


AcuRite 01083 Pro Accuracy Indoor Temperature and Humidity Monitor

If you need a high-quality hygrometer produced specially for indoor use, this product should be on your list. It measures humidity and temperature and helps to ensure that your plants grow in a suitable environment. It is also well known for its accuracy, and this is one of the most vital features a hygrometer should possess. Its sensors are high level, and it displays the humidity level of a room every 10 seconds. It is able to measure 1 to 99 percent relative humidity. It also has a colour-coded bar that allows you to monitor when the humidity is low, high, or perfect.

Key Features:

  • Accurate low and high records
  • Air comfort indicator
  • Mounting options
  • American based +/-2 percent accuracy


  • Brand: AcuRite 01083 Pro Accuracy Indoor Temperature and Humidity Monitor
  • Model: AcuRite 01083 Pro Accuracy Indoor Temperature and Humidity Monitor
  • Weight: 3.87 Ounces
  • Dimensions: 0.88 * 2.5 * 3 inches
  • It is portable
  • Easy to read displays
  • It has mountable options
  • It has an easy setup
  • The comfort zone scale is easy to understand
  • It doesn’t come with any light, and this can make it difficult to read at night


Habor Digital Hygrometer Indoor Thermometer

When you step into your grow room, do you feel wet or dry? You need a hygrometer to know the humidity and temperature levels in your grow space. This unit is incredibly portable and easy to install. It provides you with more than one mounting option. You can decide to go with the table standing method, the wall hanging design, or you could mount it with the magnet attached to it. It also comes with twenty-four sensitive vents that allow the device to provide you with fast responses and a detection time of ten seconds. It continues to provide you with accurate and updated readings.

It has a wide measuring range of 20 to 95 percent, while the scale for the temperature ranges from 32.0 to 122.0 degrees Fahrenheit. It also features a comfort level indicator that tells you the situation inside your grow room. It has a simple digital display, and you can use the function button to switch between the temperature units, from Fahrenheit to Celsius.

Key Features:

  • Pocket size
  • 10 seconds fast response
  • Air comfort level indicator
  • LCD display monitor
  • Different mounting options


  • Brand: Habor Digital Hygrometer Indoor Thermometer
  • Model: Habor Digital Hygrometer Indoor Thermometer
  • Weight: 1.28 Ounces
  • Dimensions: 2.44 * 2.09 * 0.71 inches
  • It is extremely portable
  • It has fast detection and response time
  • You are alerted to abnormal conditions by its comfort level feature
  • It has more than one mounting option
  • You can easily switch the temperature units with its function button
  • It comes with CR2 batteries
  • The batteries that it comes with have a short life span


XIKAR PuroTemp Digital Hygrometer Rectangular

This hygrometer is great for first-time users due to its simple design. It uses a three-button design that allows the user to calibrate it easily. The calibration is easy, thanks to its included instructions.

It is an incredibly portable device, and mounting is easy because of the magnets it comes with; the magnets make it possible for you to place it on a metallic surface. It also comes with a metal mount with adhesive backing, thereby allowing you to mount it on a non-metallic surface. A button cell battery powers it.

This hygrometer can measure any change in humidity or temperature, even if it happens in seconds.

Key Features:

  • Designed with brushed aluminium
  • 10 seconds refresh rate
  • Displays min/max humidity records


  • Brand: XIKAR PuroTemp Digital Hygrometer Rectangular
  • Model: XIKAR PuroTemp Digital Hygrometer Rectangular
  • Weight: 0.353 Ounces
  • Dimensions: 3.75 * 2.5 * 1 inches
  • It is portable
  • User friendly
  • It comes with various mounting options
  • It has a little stand at its back, so it can’t stand properly on a table


ThermoPro TP63 Digital Wireless Hygrometer and Thermometer

This hygrometer is one of the best from ThermpPro. It comes in a package that contains a remote receiver, user manual, remote transmitter, power plug, two AAA batteries, wall adapter, and I year warranty card.

It is incredibly easy to set up this unit. All you are required to do is place the batteries in the battery compartment. This unit runs on autopilot and can turn on, start a search for a remote controller and connect itself. Its remote transmitter is completely rechargeable. Its display shows the temperature outdoors as well as the humidity, indoor temperature, and trend arrows. You will find the button for channel/sync behind this unit; you will also find buttons for Fahrenheit/Celsius, min/max, and the clear button. Pressing the channel button will allow you to change from channels one, two, three.

Key Features:

  • Weatherproof sensor
  • Cold-resistant
  • Rechargeable
  • Touchable backlight LCD screen
  • Smart design
  • Multiple mountable options


  • Brand: ThermoPro
  • Model: ThermoPro TP63 Digital Wireless Hygrometer and Thermometer
  • Weight: 6 Ounces
  • Dimensions: 2.72 * 3.23 * 0.91 inches
  • It has a waterproof design so that it won’t be affected by humid conditions
  • It can sync to three remote sensors
  • Its trend arrows allow you to adjust the unit easily
  • It has a wireless remote with a range of 200 feet
  • It is completely rechargeable
  • The backlit readout provides you with clear readings
  • It has a reliable temperature accuracy
  • The transmitters charging time is not stated


Bjerg Instruments Antique Thermometer And Hygrometer

If you want a unique hygrometer that isn’t digital, then you can use this Bjerg instruments. It is a clock-like humidity and temperature monitor. It is available in five finishes: brass, copper, bronze, antique copper, and satin nickel finish. It has an easy to read analog output. The large scale is the Fahrenheit scale of -20 to 120, and the smaller scale is the Celsius scale of -30 to 50.

You will find the humidity scale at the bottom, and it ranges from 0-100 percent with increments of 10 percent. It comes with a clear plastic optical lens that is shadow resistant, thereby making it durable. Its body is scratch resistant because of its steel construction. This unit comes preset by the manufacturer.

Key Features:

  • 8-inch hygrometer and thermometer monitor
  • 5.5-inch diameter dial
  • Double display of Fahrenheit and Celsius
  • Steel build
  • Antique copper finish
  • Glass lens


  • Brand: Bjerg Instruments
  • Model: Bjerg Instruments Antique Indoor/Outdoor Thermometer & Hygrometer
  • Weight: 2.39 Ounces
  • Dimensions: 8.9 * 8.6 * 3.2 inches
  • It has an antique look that is lovable
  • It has a large diameter, which allows you to see the pointer easily
  • It is highly durable thanks to its steel material
  • It is easy to adjust
  • It takes time to adjust to the conditions of a grow space

Buying Guide Questions

What is the best hygrometer? How do I choose a hygrometer?

Our personal favourite when it comes to hygrometers is the ThermoPro TP65 Digital Wireless Hygrometer. It offers everything you need in an efficient hygrometer.

When choosing a hygrometer, consider the following:

  • Purpose: Determine if you need it for home use, cigar humidors, or greenhouse monitoring.
  • Features: Look for additional features like temperature readings, wireless connectivity, and data logging.
  • Accuracy: Ensure it meets the accuracy level you require for your specific application.

As we said earlier, you need to consider what applications you intend on using the hygrometer for, whether you want constant monitoring or not. After considering the important factors, go ahead and choose which one best suits your needs.

Which hygrometer is most accurate? How accurate is a hygrometer?

One of the most accurate hygrometers is the Caliber 4R and Calibre IV . they read between +/-1% relative humidity with a humidity range of 20 to 9- percent.

Hygrometers have an accuracy of +/-2% RH with a range of 5 to 95%.

What is the difference between a hydrometer and a hygrometer?

  • Hygrometer: Measures humidity and water vapor in the air.
  • Hydrometer: Measures the specific gravity or density of a liquid.

Where is the best place to put a hygrometer?

Place your hygrometer in an area where the moisture isn’t directly affecting the abilities of the hygrometer. Ideal humidity levels should be placed between 30 percent to 50 percent.

Are cheap hygrometers accurate?

Digital hygrometers are more affordable than analog hygrometers, and they are incredibly accurate.

How long does it take for a digital hygrometer to read?

It takes about 8 to 12 hours for a hygrometer to read the humidity inside a room correctly.


To ensure that the humidity level and environment are suitable for your plants, whether outdoor or indoor, you need to constantly monitor the humidity levels with the best hygrometer available, especially if you want to reap the benefit of your labour. There are various kinds of hygrometers, and a majority of them double as thermometers. The products that have been listed above will help you make a choice on which hygrometer best serves you so that you can have a fruitful harvest.


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