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In This Review: Our Top Picks | Best Overall | Best Display | Best Smart | Most Versatile | Most Portable | Best for Cigars | Best Pack | Buying Guide | How to Measure Humidity | Hygrometer FAQ | Our Methodology
A hygrometer is a monitoring device that measures humidity levels in the air and a location’s ambient temperature. It can be a handy instrument for maintaining a comfortable and healthy indoor environment or for monitoring the humidity levels of plants or other items.
A single electric hygrometer typically costs between $10-25, but some models with more extensive features may slightly exceed that amount. To help you find the best hygrometer for you, The This Old House Reviews team researched the top-end hygrometers on the market. Overall, our top choice is the ThermoPro TP49 Digital Hygrometer, which features a built-in battery that lasts 18 months and displays both humidity and temperature levels. Read our guide below for more of our top picks
Top 7 Hygrometers
- Best Hygrometer Overall: ThermoPro TP49 Digital Hygrometer
- Best Display: ThermoPro TP55 Jumbo Touchscreen Hygrometer
- Best Smart Features: Govee Bluetooth Digital Hygrometer Set
- Most Versatile: AcuRite 00613 Digital Hygrometer
- Most Portable: JEDEW Two-Pack Mini Hygrometers
- Best for Cigars: Cigar Oasis Hygrometer and Humidity Sensor
- Best Pack: Pgzsy 12 Pack Digital Electronic Thermometer and Hygrometer
Compare Top Hygrometers
| Product | Humidity Range | Temp Range | Mount Options | Power Source | Width x Height |
|---|---|---|---|---|---|
| ThermoPro TP49 Digital Hygrometer | 10%–99% | -58°F–158°F | Magnetic, tabletop, wall | AAA battery (x1) | 2.6 x 2.2 inches |
| ThermoPro TP55 Jumbo Touchscreen Hygrometer | 10%–99% | -58°F–158°F | Magnetic, tabletop, wall | AA battery (x2) | 3.3 x 4.3 inches |
| Govee Bluetooth Digital Hygrometers | 0%–99% | -4°F–140°F | Adhesive, tabletop | CR2430 (x1) | 2 x 2 inches |
| AcuRite 00613 Digital Hygrometer | 16%–98% | 32°F–122°F | Clip, magnetic, tabletop, wall | AA battery (x1) | 3 x 2.5 inches |
| JEDEW Two-Pack Mini Hygrometers | 10%–99% | 32°F–158°F | Adhesive | LR44 (x1) | 1.7 x 1.7 inches |
| Cigar Oasis Hygrometer and Humidity Sensor | 0-99% | N/A | Wall | Analog | 2.3 x 2.3 inches |
| Pgzsy 12 Pack Digital Electronic Thermometer and Hygrometer | 10%-99% | -58°F–158°F | Tabletop | LR44 (x2) for each unit | 1.9 x 1.1 inches |
| Product | Humidity Range | Temp Range | Mount Options | Power Source | Width x Height |
Best Hygrometer Overall
ThermoPro TP49 Digital Hygrometer
- $9.99
- $11.99
- 17% off
Prices taken at time of publishing.
What Customers Are Saying
We culled through thousands of buyer reviews for the ThermoPro TP49. Numerous positive reviews praised the unit’s durability, compact design, and relatively sizable, easy-to-read LCD screen.
We also came across some critical reviews. The most common complaints we found were that the TP49’s humidity gauge accuracy could be off by several percentage points—one buyer claimed their unit was off by up to 11%.
“I bought this to double-check the temperature in my son’s room. His baby camera has a thermostat that I wasn’t sure was accurate as it was next to the heating vent. I placed the ThermoPro in other places in the bedroom and it confirmed the temperatures. The letter size is great because I can read it across the room. It is also compact and lightweight enough that I have been able to take it with me when I travel. No issues so far with the battery life but time will tell. Overall I would buy it again.” —Daniel Penser Cardenas via Amazon
“The humidity gauge reads 11% humidity right out of the box, only got it to read as high as 15% over the course of the day. I have a professional temperature + humidity probe inside of a tank that sits around 70% humidity and this thing still wouldn’t budge at all. The temperature gauge seems to be more or less accurate.” —Shannon via Amazon
Best Hygrometer Display
ThermoPro TP55 Jumbo Touchscreen Hygrometer
- $13.99
- $19.99
- 30% off
Prices taken at time of publishing.
What Customers Are Saying
Our review of verified-buyer feedback revealed that buyers particularly liked the TP55’s touchscreen interface and large digital numbers because they were easy to see from a sizable distance. However, we also came across some critical reviews. In one case, a customer claimed that the unit failed to give accurate humidity and temperature readings after five years of use. In another instance, a customer said the AA batteries only lasted 10 months.
“This indoor thermometer is small and compact. It can hang on a wall or stand on a shelf or table; very easy to read temperature and humidity. It has a blue backlight operated by light touch. It helps me to regulate the settings of my portable space heaters. I can’t comment on battery life yet because I’ve had it such a short time, but I would definitely recommend this product.” —P Merrill via Amazon
“I bought this in January 2018. It worked great for almost five years but started to get inaccurate this past winter (2022-23). I bought its cousin, the ThermoPro TP53, to replace it and verify my suspicions. I have another hygrometer attached to a whole-house humidifier. When I got the TP53, I confirmed that it reads identical to the hygrometer on the humidifier and that my TP55 unit was no longer reporting humidity at all accurately: 20% when the reality was 45% as confirmed by the other two units. So while I thought the device was perfect before, 5 years isn’t that great of a run. You’ll have to decide for yourself if you think so too.” — A man a panama via Amazon
Best Smart Hygrometer
Govee Bluetooth Digital Hygrometer Set
- $25.99
Prices taken at time of publishing.
What Customers Are Saying
Per our research, customers were especially pleased with the Govee hygrometers’ smart capabilities, which allow users to differentiate between separate units in the app. Several customers also applauded Govee’s customer service for its quick response time and effective solutions. However, we learned that a handful of customers experienced readout inconsistencies between the pair, while others were disappointed in the battery life.
“You get two identical thermometer-hygrometers in the package. Easy to use out of box, and no need to use the iPhone app if you don’t want to. The app allows you to keep a record of readings, and more interestingly, allows you to calibrate both the temperature and humidity readings, pretty neat!” — Old-and-Wise via Amazon
“This hygrometer is great. Connects to Govee app, plus display screen. Happy with the performance and it does its job well. However, I did not expect that I’d be changing the batteries literally every few weeks. And that the battery is a very specific type which is hard to find and not cheap. As a result, I’ve stopped using these completely and switched to the Govee H5100, which annoyingly lacks a screen, so it can be accessed through the app only but runs on a regular AAA battery and lasts for months. This one shortcoming is unfortunate for an otherwise great product. (And I don’t believe the problem is that I’m using bad batteries — I use brand new, sealed batteries from reputable sellers)” —Y via Amazon
Most Versatile Hygrometer
AcuRite 00613 Digital Hygrometer
- $11.17
Prices taken at time of publishing.
What Customers Are Saying
We found thousands of positive verified buyer reviews for the AcuRite thermometer-hygrometer. Most reviewers praised the unit for its intuitive interface, long battery life, and ability to record high and low metrics over 24 hours—ideal for reptile owners. On the other hand, the most helpful critical reviews we found complained about the quality of the back clip mount and found that while the temperature readings were highly accurate, the humidity readings were typically off by more than 5%.
“Very easy to read, even from across the room. Looks great too. Best of all it’s accurate! I like that it keeps highs and lows of temp and humidity levels for the past 24 hours. That is very useful. Great price and delivery from Amazon. I bought more, so I’m happy [and] satisfied with my purchase. Recommend.” —Dave via Amazon
“This item does a good job of monitoring temperature and humidity and high and low history of each but the clip is its weak point. Although diverse in its function, the first time that I squeezed the clip for a squeeze attachment, it kind of exploded with the spring bar and its other respective parts just flying all over the room. Couldn’t repair. It still functions, but I have to lean it against something for it to stand upright, and I can’t attach it to anything. For the price, disappointed, obviously” —teejerman via Amazon
Most Portable Hygrometer
JEDEW Two-Pack Mini Hygrometers
- $9.95
- $12.99
- 23% off
Prices taken at time of publishing.
What Customers Are Saying
According to our buyer research, thousands of reviewers praised this simple two-pack for its ease of use, exceptional portability, and ability to provide adequate humidity and temperature readings in various settings, including greenhouses and terrariums. However, our evaluation of critical feedback revealed that a minority of buyers received uncalibrated units, and several found that the display was too dark and, therefore, difficult to read.
“These stick well to the glass of my bearded dragon tank. The 2 pack is great, and allows for one on the cool side and the hot side of the tank. Helpful that it has humidity and temperature. Batteries seem easy to replace, it even comes with a few. Also comes with extra sticky pads for when you have to take it off to replace the battery. I was able to peel and stick multiple times without it losing its stickiness!” —Erin via Amazon
“I thought this would be a great cost-effective way to monitor my snake tank. Guys, right away, one was completely inaccurate, and now the humidity isn’t correct on either of these. They are only easy to read when light shines directly on the face, so checking after dark is almost impossible. I love that it’s super light and compact, too bad it didn’t work, to begin with.” —Maggie via Amazon
Best for Cigars
Cigar Oasis Hygrometer and Humidity Sensor
- $8.99
- $10
- 10% off
Prices taken at time of publishing.
What Customers Are Saying
We found that customers who were pleased with this hygrometer particularly liked that it produced accurate humidity readings that were perfect for cigars, and had a stylish design. That could be displayed. However, we did note that some customers found the calibration method to be challenging, and others claimed the numbers were difficult to read.
“I have this in a sealed Tupperware humidor with my cigars, when in the humidor with my 60% humidity packs, it tracks at 60%, so as best as I can assume, it’s accurate. The looks are AMAZING, it’s a small metal canister with a strong build and no visible plastic, very premium HIGHLY recommend it.” — Kaitlyn Osborn via Amazon
“The only redeeming quality of this hygrometer is that it looks nice. However, it is impossible to calibrate. Apply some pressure to turn the screw in one direction, and it may jump by 5-10% in the one or the other direction, which is a complete surprise each time. After many, many attempts, I had to give up. Fortunately, it doesn’t cost much, but ultimately, it’s a waste of money because it can’t be calibrated, so you won’t get accurate readings. But, it does look nice!” —Joe P. via Amazon
Best Pack
Pgzsy 12 Pack Digital Thermometer and Hygrometer
- $19.99
- $28.99
- 31% off
Prices taken at time of publishing.
What Customers Are Saying
Our team found that customers who were satisfied with their purchase of this product liked how easy they were to set up and how it clearly displayed results on the LCD screen. Others raved about their value, with a relatively cheap price for a pack of 12. However, there were some reviewers who found that these hygrometers were often inaccurate, and a few customers had issues with some of the devices not working properly.
“I bought a set of 4 a year ago to try them out. They are easy to read, fairly accurate for my cigar humidors and the batteries last a very long time. I was so happy with them, I bought 12 more. At the price of just over $1 a piece, this is a super deal.” — Coffee via Amazon
“Liked: A lot of measuring devices in one package. Needs improvement: Not consistent. I have three of these units one inch apart on top of an AC (not running), and their reading are: 67%, 71%, and 66%. While I am mostly using these units to gauge if the humidity is over 50% or not, should I take action if it is 49% or when it is 45%?” — #1 Asia Father via Amazon
What Do You Need to Know When Buying a Hygrometer?
While hygrometers all perform the same basic function, they vary significantly in terms of their make and model. For example, analog hygrometers may present a more classic design than electric models but typically provide less information and may be less accurate. You should also consider factors such as the notification system, power sources, and weather readings. Read our buying guide below for more information about finding the best hygrometer.
Analog vs. Digital Hygrometers
Hygrometers come in both digital display and analog formats. Digital electrical hygrometers have built-in screens that display humidity readings in numbers. They typically provide more information than their non-digital counterparts, too.
Our team also learned that newer models often come with smart home integration, data logging, a built-in wireless thermometer, and a touchscreen user interface—though they’re typically more expensive.
While digital devices are more popular, some homeowners select analog models due to their easy-to-read display and relatively low maintenance—most mechanical hygrometers don’t need to be calibrated often to provide accurate readings.
Notifications
Some hygrometers offer push notifications that help homeowners quickly identify spikes in indoor temperatures and humidity levels. For example, the Govee Bluetooth Digital Hygrometer connects to your smartphone and sends alerts when levels break a preset range.
Without Wi-Fi connectivity and remote monitoring, homeowners must periodically check their hygrometers to ensure that readings meet their standards.
Power Sources
While analog hygrometers don’t require power, digital hygrometers do. Many models are powered by a single, changeable battery, which makes them highly portable.
Weather Readings
Many indoor hygrometers display additional environmental readings on their LCD screens. For example, the ThermoPro TP55 Jumbo Touchscreen Hygrometer displays the indoor temperature and humidity, as well as low and high records for that day.
Other Ways To Measure Humidity
Hygrometers are an excellent way to measure humidity and temperature levels, but there are also other ways to track such information, including devices you may already own, such as:
- HVAC System Monitors: Some heating, ventilation, and HVAC systems have integrated humidity sensors that monitor and display humidity levels. These systems may also offer control options to adjust the humidity levels in your home.
- Indoor Plants: Certain plants are sensitive to humidity levels and can serve as natural indicators. For example, some species of ferns or peace lilies may show signs of drooping or browning when the air is too dry. While not as precise as a dedicated measuring device, observing the condition of your indoor plants can give you a general sense of the current humidity levels in your home.
- Indoor Weather Stations: An indoor weather station is a comprehensive device that typically includes a hygrometer along with other sensors like a thermometer and barometer. These devices can display real-time humidity levels and other weather-related information.
- Smart Home Devices: Many smart home devices, such as smart thermostats or home assistants like Amazon Alexa or Google Home, come with built-in sensors that have the ability to measure and display humidity levels. They can provide humidity information with a voice command or display the information on your smartphone.
- Weather Websites and Apps: Online weather websites and mobile applications often provide current humidity levels based on local weather stations. While these readings may not be specific to your home, they can still give you a general idea of the humidity in your area.
Hygrometer FAQ
What humidity level is ideal for indoor environments?
To keep your indoor area healthy and comfortable, ensure that your hygrometer monitors around 45% humidity, Air Experts tells us.
If you struggle to keep the humidity levels lower than 50%, consider a dehumidifier, as mold, bacteria, and more hazards can arise when humidity is too high.
Conversely, if your home’s humidity levels fall below 30%, consider investing in a humidifier and air purifier, as overly dry environments can create any number of respiratory, skin, and other health issues.
What does a humidity reading mean?
Humidity is a measurement of the amount of moisture the air is holding. For example, if the humidity meter is at 33%, the air holds about a third of the moisture it can at that given temperature.
How does temperature impact humidity?
Warm air can hold more moisture, so the summer months are typically more humid than the winter months.
How does a hygrometer work?
According to the Encyclopaedia Britannica, hygrometers measure humidity levels using various principles, such as the expansion and contraction of organic substances like goldbeater’s skin or human hair in response to humidity changes.
Are hygrometers accurate?
The accuracy of hygrometers can vary depending on the type and quality of the device. Digital hygrometers are generally considered more accurate than analog ones. It’s important to choose a hygrometer with a high level of accuracy for precise humidity monitoring.
Can hygrometers measure both humidity and temperature?
Yes, many hygrometers measure both humidity and temperature. In addition, these devices often provide dual readings, allowing you to gauge the ambient temperature in addition to humidity.
As you’ve probably noticed, we only included hygrometers with thermometer functionality in our product review section.
How We Selected the Best Hygrometers
To provide our readers with the best hygrometer recommendations possible, we rely on several key sources of information to help guide our selection process.
Initial research: Our research process began by generating a list of hygrometers with a significant number of verified-buyer reviews and an average customer review rating of 4–5 stars. We looked at positive and negative reviews alike, focusing on information from both satisfied and critical buyers.
Expert insights: Through our years of experience, we’ve learned that listening to what others have to say is critical to building accurate, well-rounded articles. To complement our in-house expertise, our team looked at reviews and videos from trusted publications and independent testers, spoke with subject matter experts, and drew insights from reader contributions.
Final product selection: We then pared the list down further by comparing each product’s benefits and selecting the best-in-class options for various buyers, budgets, and scenarios.
Why You Can Trust Us
This Old House has empowered homeowners and DIY-ers for more than four decades with top-notch home improvement advice in the form of television programs, print media, and digital content.
Our team focuses on creating in-depth product and service review content. To date, we’ve published over 1,600 reviews on products in the home space, from doorbell cameras and backyard fencing to pool vacuums and snow blowers.
Once we conclude our research, we craft a comprehensive, user-friendly article of recommended products and additional information to help our readers make the right purchase.
Questions or Comments?
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