Holds a Master’s degree in Engineering and is keen on her own home’s climate. Sometimes we think that Carolina owns every single product she writes about – that’s how profound and insightful her reviews always are.
For 8 years, Richard had been working as an HVAC specialist and AC unit installer since his student years. Now, he’s our main consultant on every technical aspect that may arise during our tests and research.
Last updated: June 13, 2021
Did you know that maintaining the correct humidity level in a room is important not just for your health but also for your belongings, which can become damaged when kept in a too humid or too dry environment? The best hygrometers make it easy to measure humidity in a particular space so that you can stay on top of the levels in your home. But not all models are created equal, so you’d be surprised to learn that it actually takes quite a bit of research to decide which model is the right choice for your home.
To help you with your decision, we looked at the best hygrometers available on the market and compared their features, so you don’t have to do lots of research on your own. Some of the most important features we considered in the hygrometers we tested included humidity range, temperature range, accuracy, data update frequency, power source, and dimensions. Now, let’s have a look at the models that made it to the top!
Top 10 Hygrometers Review 2021
ThermoPro TP50 – Editor's Choice
Humidity range: 10% – 99%
Temperature range: -58°F – 158°F
Accuracy: ±2 – 3%RH and ±1°F
Data updates: every 10 seconds
Power source: 1x AAA battery (included)
Dimensions: 3.11 x 0.84 x 2.62 in.
More features: tabletop stand design with magnetic back, face icon comfort level indicator, high and low records
If you’re interested in getting the best digital hygrometer on the market, the ThermoPro TP50 is a perfect choice. It sports a large digital display and provides you with humidity and temperature measurements. Besides showing you the current humidity levels, the ThermoPro TP50 also tracks the highs and lows for both. This hygrometer has a tabletop stand design and has a magnetic back, so you can attach it to a metal surface if you want, such as your refrigerator, for example.
The air comfort indicator of the ThermoPro TP50 lets you know the condition of the air with a simple icon, so you can see at a glance whether the air is at comfort level, or too dry, or too wet. When it comes to temperature, you can choose from Celsius or Fahrenheit scales. All data is updated every 10 seconds, so you can always have the latest information about your environment.
Why is it special? The ThermoPro TP50 has a large display with big digits that makes it easy to read and comes complete with a face icon comfort indicator, so you don’t have to spend too much trying to figure out what the numbers mean.
What are the flaws? A few users reported problems with the screen, but this was not a common issue.
Veanic Mini Digital Electronic Temperature Humidity Meters – Best Value
Humidity range: 10% – 99%
Temperature range: -58℉ – 158℉
Accuracy: ±5%RH and ±2℉
Data updates: every 10 seconds
Power source: LR44 button cells (2 included)
Dimensions: 1.89 x 1.13 x 0.6 in.
More features: value pack with 4 pieces, ABS plastic housing
The Veanic Mini Digital Electronic Temperature Humidity Meters is a value pack of hygrometers that comes with no less than four pieces so you can measure the temperature and humidity in different areas of the home. These hygrometers take measurements every 10 seconds, and they provide you with accurate readings.
With the Veanic Mini Digital Electronic Temperature Humidity Meters, you can see the current room climate and adjust the humidity and temperature as required. The hygrometers use two LR44 button batteries, which are quite simple to find in the nearest store. Each unit measures a humidity range between 10% and 99%, and the temperature range is -58℉ – 158℉. The Veanic Mini Digital Electronic Temperature Humidity Meters are suitable for home use, but they also work well in offices, warehouses, and greenhouses.
What makes it special? The Veanic Mini Digital Electronic Temperature Humidity Meters work well if you’re looking to purchase more than one hygrometer to use in multiple rooms.
What cons did we find? This set of four hygrometers could use some improvements with accuracy. The results these units display might not always be the same when you place them all in the same room.
Ideal Sciences Temp Stick – Premium Pick
Humidity range: 0% – 100%
Temperature range: -40℉ – 140℉
Accuracy: ±4%RH and ±0.4°C
Data updates: 24/7 updates with unlimited history
Power source: 2x AA batteries (included)
Dimensions: 3.5 x 1.5 x 1.25 in.
More features: Wi-Fi connection, suitable for homes, refrigerators, walk-in coolers, easy to set up, 3-year warranty
A suitable choice not only for homes but also walk-in coolers and refrigerators, the Ideal Sciences Temp Stick has a Wi-Fi connection, so you can hook it up via an app on your phone to make it easy to monitor humidity and temperature. The stick offers 24/7 monitoring and alerts and doesn’t require any fees or subscriptions.
The Ideal Sciences Temp Stick offers a data logger and unlimited history, and it’s very easy to set up. It requires 2 x AA batteries that are included in the box, and it comes with a 5-year manufacturer warranty. While you can’t see the readings on the stick itself, the dashboard of the app offers you lots of information and statistics, including the min-max value in a specific time range.
The Ideal Sciences Temp Stick has a solid battery life, but you need to keep in mind that you might have to replace the batteries more often if you set a high frequency of sending data to your phone.
What stands out? The Ideal Sciences Temp Stick is very easy to set up, and it makes it very convenient to check the humidity and temperature in your home thanks to the app connectivity.
What cons did we manage to find? This hygrometer is a bit expensive, and it offers lots of info and statistics that might be too much for consumers who only want access to basic information.
Cigar Oasis Caliber IV Digital Hygrometer – Best Hygrometer for Cigars
Humidity range: 20% – 90%
Temperature range: -32℉ – 120℉
Accuracy: ±1%RH and ±1℉
Data updates: every 10 seconds
Power source: CR2032 battery
Dimensions: 3.94 x 0.39 x 1.18 in.
More features: slim profile design, max/min records, magnetic back, pre-calibrated
If you’re looking for the best hygrometer for cigars, the Cigar Oasis Caliber IV Digital Hygrometer is the perfect model. This is a compact, practical, and high-quality hygrometer that provides accurate readings and has the ability to adjust calibration. The Cigar Oasis Caliber IV Digital Hygrometer sends data updates every 10 seconds and has a magnetic back so you can place it on a metallic surface.
The Cigar Oasis Caliber IV Digital Hygrometer makes it easy to switch between Fahrenheit and Celsius scales and has a high/low memory for both temperature and humidity. It has a high accuracy rate and is factory calibrated, but also makes it super easy to re-calibrate when necessary.
This digital hygrometer has been ranked as the most reliable and accurate hygrometer by the cigar industry and is the best choice to have in your humidor to store your cigars correctly.
What stands out? The Cigar Oasis Caliber IV Digital Hygrometer has a slim design and offers all the benefits of digital features.
What cons did we manage to find? The Cigar Oasis Caliber IV Digital Hygrometer could benefit from alert options, but unfortunately, this model doesn’t have them.
Habor Hygrometer – Best Large Display Hygrometer
Humidity range: 20% – 95%
Temperature range: -32℉ – 122℉
Accuracy: ±5%RH and ±2.7℉
Power source: CR2 battery (included)
Dimensions: 2.44 x 2.09 x 0.71 in.
More features: air comfort level indicator, multiple mounting options
The Habor Hygrometer comes with a large display that’s easy to read and has a backlight feature, so you can place it in a low light area if need be. This model has multiple mounting options for extra versatility and sports an air comfort level indicator. It updates the readings every 10 seconds and displays the highs and lows of humidity and temperature on the screen.
This Habor Hygrometer provides readings 24 hours a day, and the results are highly accurate. The hygrometer is powered by a CR2 battery that’s included in the box. You can easily switch the temperature units, and the clear LCD display is easy to read even from a distance. Because it can be mounted on a wall, placed on a table, or put on the refrigerator thanks to its magnetic backside, the Habor Hygrometer is ideal for every room, from the kitchen and baby room to a guitar room or a greenhouse.
What are its best features? The Habor Hygrometer has a sleek design with an LCD screen that’s easy to read and provides accurate readings.
What could be improved? The magnetic back of the Habor Hygrometer could work better.
SensorPush Wireless Thermometer/Hygrometer – Best Smart Hygrometer
Humidity range: 0% – 100%
Temperature range: -40℉ – 140℉
Accuracy: ±3%RH and ±0.9°F
Data updates: every minute (20 days on-board data storage, unlimited in app)
Power source: CR2477 battery
Dimensions: 1.57 x 1.57 x 0.65 in.
More features: Bluetooth, can be upgraded to send updates with Wi-Fi, excellent wireless range, easy to set up
The SensorPush Wireless Thermometer/Hygrometer is not just a hygrometer, as it has all the functions of a climate monitoring system, offering users a wide selection of analytical features that you’re unlikely to get in any other hygrometer on the market.
A very small device, the SensorPush Wireless Thermometer/Hygrometer sports Bluetooth connectivity and has an excellent wireless range. It is easy to set up, and you can upgrade it to send updates with Wi-Fi. The SensorPush Wireless Thermometer/Hygrometer stores up to 30 days of data, and you can get alerts sent to your smartphone when you’re in the Wi-Fi range. The interface is very intuitive, and you can see reports in daily, weekly, and monthly modes. The hygrometer requires a high-capacity battery that gives you up to 12 months of continuous use.
Why is it special? The SensorPush Wireless Thermometer/Hygrometer offers you access to a wealth of data, and it works well for anything from a baby’s room to a wine fridge.
What are the flaws? Just like many other smart hygrometers, the SensorPush Wireless Thermometer/Hygrometer is on the expensive side but offers exceptional functionality.
Govee Mini Bluetooth Humidity Sensor – Best Hygrometer with Bluetooth Connectivity
Humidity range: 0% – 99%
Temperature range: 14℉ – 140℉
Accuracy: ±3%RH and ±0.54°F
Data updates: (20 days on-board data storage, 2 years in app)
Power source: CR2477 battery
Dimensions: 1.57 x 1.57 x 0.67 in.
More features: Bluetooth, space-saving design, hanging hole
A space-saving smart hygrometer that is easy to install anywhere in the house, the Govee Mini Bluetooth Humidity Sensor allows you to monitor humidity and temperature data via an intuitive app using Bluetooth. The hygrometer has a built-in Swiss-made sensor that offers highly accurate readings.
When data goes out of the preset range, you can receive alerts on your phone, and you can also export data on your phone to keep track of changes. The Govee Mini Bluetooth Humidity Sensor has an ultra-compact size, which makes it possible to install it exactly where you want.
The Govee Mini Bluetooth Humidity Sensor offers 20 days of on-board data storage and two years in the app. It comes with a two-year warranty, and you’ll need to replace the battery every four to six months, depending on the frequency you choose for sending data to your phone.
What are its best features? The Govee Mini Bluetooth Humidity Sensor is easy to use and sends all the data you need, complete with alerts, straight to your smartphone.
What could be improved? The unit runs out of battery a bit faster than some of its counterparts.
Ambient Weather Wireless 8-Channel Thermo-Hygrometer – Best Hygrometer With Multiple Remote Sensors
Humidity range: 10% – 99%
Temperature range: -4℉ – 140℉
Accuracy: ±3 – 5%RH
Data updates: every minute
Power source: 4 x AAA batteries for main unit and 2 x AAA for each sensor
Dimensions: 4.5 x 5 x 1 in. (console)
More features: includes four remote sensors with displays, 100+ ft. transmission range, min and max visual alarm settings
Another good option for those looking for a hygrometer with multiple sensors, the Ambient Weather Wireless 8-Channel Thermo-Hygrometer includes four remote sensors, each with their own display. The main display has a large LCD screen that’s easy to read, and it shows humidity and temperature and remembers minimum and maximum parameters. You can add up to four more sensors if you need comprehensive monitoring.
The Ambient Weather Wireless 8-Channel Thermo-Hygrometer has a 100+ ft. transmission range, and you can set the device to send alarms when temperature and humidity are out of normal ranges. The temperature range for this hygrometer is 4℉ – 140℉, and you can choose to display the degrees in Fahrenheit or Celsius.
What makes it special? The Ambient Weather Wireless 8-Channel Thermo-Hygrometer works great if you need to measure and monitor temperature and humidity in multiple places at the same time.
What cons did we find? Each sensor requires a battery, so replacing all of them is somewhat expensive.
More features: can be re-calibrated, color-coded, sharp round design, magnetic back
If you’re interested in a unit that you can use successfully in a humidor, the Cigar Oasis Caliber 4R Gold Digital/Analog Hygrometer is an excellent choice. This hygrometer has a unique, distinguishable design, and its accuracy levels are similar to those you can obtain in laboratories. The compact hygrometer can measure the +/- 1 % RH within the 20-90% range.
The Cigar Oasis Caliber 4R Gold Digital/Analog Hygrometer is calibrated in the factory, but it is also easy to re-calibrate as needed. Even though this hygrometer has a traditional analog design, it also has a built-in digital display for easy reading. The analog display is color-coded, and the sharp round design makes it a suitable choice for any cigar box.
What makes it stand out? The Cigar Oasis Caliber 4R Gold Digital/Analog Hygrometer has a unique design and can be re-calibrated as needed.
Which disadvantages must you keep in mind? Unfortunately, many customers say that the manual is useless, and there is no battery included.
Extech Humidity Alert II – Best Hygrometer for Areas Prone to Mold
Humidity range: 10% – 99%
Temperature range: 14℉ – 140℉
Data updates: not specified
Power source: 2x AAA batteries (included)
Dimensions: 4.3 x 3.9 x 0.8 in.
More features: built-in stand, alarm with programmable set point, large triple display that shows humidity, temperature, and dew point
The Extech Humidity Alert II has a large display that’s super easy to read and shows temperature, humidity, and dew point. You can see all the information at a glance thanks to the design of the display, and the hygrometer can recall minimum and maximum readings. This is a perfect device to have in humid areas where mold is likely to be an issue.
The Extech Humidity Alert II can be programmed to send out alarms when humidity levels are too high or too low. The alarms can be visual or audible according to your preference. Also, the hygrometer has a built-in stand so you can place it on a desk or table, and there is a bracket so you can mount it on the wall.
The device measures humidity accurately from 10 to 99% RH and the temperature ranges from 14 to 140°F. You can calibrate this hygrometer as needed, and an optional re-calibration kit is available as well.
What are its best features? The Extech Humidity Alert II is ideal for monitoring environmental conditions not only in homes but also in controlled environments such as storage areas and laboratories.
What could be improved? The readings of the Extech Humidity Alert II are not always completely accurate, and you cannot adjust humidity readings.
Things to Consider
The quality of air in your home or place of work is essential for your comfort, and one of the best ways to monitor it is with the help of a hygrometer. This is because humidity levels affect air quality, and as such, it’s important to track the humidity levels in your home. Finding a high-quality hygrometer is not very difficult because there are lots of models available on the market, but it’s important to purchase the right model for your particular environment and metrics you want to track. This buying guide will help you make the right decision when purchasing a hygrometer.
Reasons to purchase a hydrometer
There are multiple reasons for which you may want to purchase a hygrometer, with the most important of them being to improve the quality of air in your home. With the help of a hydrometer, you can measure how much water vapor is present in the air you breathe so you can decide whether you need to dehumidify or humidify a room according to your personal needs.
Using a hygrometer is a good way to reduce energy consumption if you’re using a humidifier, as you can turn it off when the desired level of humidity is reached.
You may also need a hygrometer for specific activities, such as when you want to keep track of the level of humidity in the air in a room where you keep your musical instruments such as guitars, or when you want to make sure the humidity is just at the right level to store your cigars correctly.
Things to consider before getting a humidity sensor
Before deciding what type of hygrometer you need, it’s important to take into account a couple of essential factors, such as areas where you intend to use it, the humidity and temperature range you need it to track, accuracy, alerts and indicators, data updates for smart models, power source, dimensions, and other functions you might be interested in. Finally, don’t forget to consider your budget to be able to find a model in your price range.
To purchase the best hygrometer for your needs, it’s important to first decide what those needs are. Some of the most common applications for hygrometers include monitoring the humidity and temperature in the home, in a guitar case, or in a terrarium, so your reptiles are happy and healthy. Other people need hygrometers for their cigars boxes, so their favorite cigars don’t get ruined by the wrong level of humidity. Consider what type of application you need before deciding which model is right for you.
Hygrometers show humidity in percentages, and many models, including smart ones, such as the SensorPush Wireless Thermometer/Hygrometer, can measure humidity from 0 to 100%. But, some hygrometers, such as the Veanic Mini Digital Electronic Temperature Humidity Meters, for example, only go from 10% to 99%, so it’s important to know what range you’re looking for to make sure that the hygrometer you choose can provide the right measurements for you.
Just like in the case of humidity, hygrometers have different ranges as well when it comes to measuring temperature. Our editor’s choice, the ThermoPro TP50, measures temperatures between -58°F and 158°F, but other models may not have the same range. In most cases, you can switch between Celsius and Fahrenheit scales with a click of a button.
As you may have already noticed, accuracy is highly important when it comes to hygrometers, so if that’s essential for you (for preserving musical instruments or cigars, for example), make sure you go for a device that checks both humidity and temperature with the highest accuracy possible. An example of a highly accurate hygrometer is the Cigar Oasis Caliber IV Digital Hygrometer, which measures those parameters within ±1%RH and ±1℉.
Alerts and indicators
The best hygrometers, particularly the smart ones that you can connect to your phone via an app, offer remote monitoring, indicators, and alerts. This means that you can monitor your device remotely, which is useful if you’re interested in being able to protect your belongings when you’re not at home.
You can set up most smart hygrometers to send you alerts when the humidity or temperatures are off the charts.
Even though many users may not be interested in data logging, if you want to have access to past data for statistical purposes, you should look for a model that has data logging capabilities. Some hygrometers log minimum and maximum ranges for up to 30 days, and you can have access to even more data if you’re using the app on your mobile phone.
Number of units in the package
If you need more than one hygrometer, it’s a good idea to look at products that come with more than one in a package. Examples include the Veanic Mini Digital Electronic Temperature Humidity Meters and the Ambient Weather Wireless 8-Channel Thermo-Hygrometer. These models come with four hygrometers per pack, so you can place one in every room of the house where you want to monitor humidity and temperature.
Most hygrometers are battery-powered, so it’s important to choose a model that works with the type of battery you want.
You should make sure you check the description of the product to determine the battery type and its expected life.
Keep in mind that models that use wireless connectivity, such as the SensorPush Wireless Thermometer/Hygrometer, for example, will drain the battery quicker because they have to send signals to your smartphone continuously.
The dimensions of the hygrometer are essential when it comes to placement. Decide where you want to set up the hygrometer, make sure it fits. Some models, such as the Cigar Oasis Caliber IV Digital Hygrometer, for example, are compact enough to fit in a cigar box, whereas others, like the Extech Humidity Alert II, are much larger but come with the added advantage of sporting a large LCD display that’s easy to read.
What else can be important?
Other features that you can expect to find in some hygrometers include Bluetooth and Wi-Fi connectivity, which are great if you want to be able to monitor the humidity and temperature in a designated space with the help of your smartphone or computer. Bluetooth connectivity allows you to receive alerts from the hygrometer when the ranges are not within the normal limits. Another thing that it’s important to look for is the NIST certification, which is the nationally recognized calibration standard for hygrometers.
The prices for hygrometers vary greatly according to their functionality and accuracy. You should expect to pay more for a smart model with smartphone connectivity and the ability to monitor humidity and temperature remotely. These should cost anywhere around $50 or more. Simpler options are much cheaper, and you can easily find reliable options at about $15.
You should place a humidity monitor in an area that’s away from ventilation units, windows, or any excess air movement. You should not place it in the kitchen where vapors from cooking can affect the readings. The humidity monitor shouldn’t be close to radiators, especially if you’re also interested in measuring the temperature in the room.
Most hygrometers should be calibrated once every year. Even though digital models are calibrated in the factory, they still require frequent calibration because hygrometers can easily become inaccurate. Some analog models have a small screw on the back for easy adjustment after calibration. The good news is that it’s not very difficult to calibrate a hygrometer. To do it, you’ll need a coffee cup, ½ cup salt, ¼ cup water, and a large freezer bag.
Start by placing the salt in the cup and then add the water on top. Stir well until all the salt is saturated; the point is not to dissolve it but to get the consistency of wet sand. Transfer the salt mix to the freezer bag and place the hygrometer in the bag, but without touching the salt. Leave the bag at room temperature for 8-12 hours, in a place with a constant temperature. After that time, check the reading on the hygrometer while still in the bag and adjust the hygrometer according to the results you get. For digital models, you’ll want to check the instructions that come with your unit.
This typically depends on the model you have, but as a rule of thumb, most hygrometers only need to have their batteries changed once every 6 to 12 months. Check the instructions provided by the manufacturer to see the exact information for your particular brand and model.
After carefully reviewing the top-rated models, we concluded that the best model that suits the needs of the majority of the consumers is the ThermoPro TP50. This hygrometer has a large digital display and provides you with humidity and temperature measurements. All data is updated every 10 seconds, and the hygrometer has a magnetic back, so you can attach it to your refrigerator, for example.
If you’re looking for a hygrometer that offers great value for money, the Veanic Mini Digital Electronic Temperature Humidity Meters offer no less than four pieces so you can measure the temperature and humidity in different areas of the home. These battery-operated hygrometers are ideal for multiple types of environments, and they work well in offices, warehouses, and greenhouses.
Finally, the best hygrometer for consumers who are interested in a premium pick is the Ideal Sciences Temp Stick. This is an app-based hygrometer that makes it super easy to monitor humidity and temperature. The dashboard of the app offers you lots of information and statistics, and the unit is very easy to set up.