10 Best Smart Humidity Sensor 2026 in the United States

The ThermoPro TP350 is a solid choice if you're looking for a smart humidity and temperature sensor for indoor use. It offers good accuracy, with temperature readings within about half a degree Fahrenheit and humidity measurements within 2%, which is reliable enough for most home or hobby needs. One of its standout features is the Bluetooth connectivity, allowing you to monitor conditions from up to 260 feet away without physical obstructions, making it easy to check your readings remotely via the ThermoPro app. The app doesn’t require registration, which is a nice privacy bonus. It also stores data for up to two years, letting you export your environmental history to spot patterns and plan adjustments, such as when to use a humidifier or change clothing. The backlit display with a comfort icon helps you quickly understand room conditions at a glance, even in low light.

This sensor runs on two included AAA alkaline batteries, providing a straightforward and widely supported power source, though you will need to replace them eventually. The device is versatile for use in bedrooms, baby rooms, greenhouses, or cigar rooms. While Bluetooth is convenient, it might not cover larger homes as well as Wi-Fi-based sensors. Mounting options are flexible, including tabletop, wall, or hanging. The TP350 offers reliable accuracy and useful data features for casual or hobby monitoring but may lack some advanced alert capabilities and longer-range connectivity for bigger spaces.

The Govee WiFi Temperature Sensor H5179 is a solid choice for monitoring temperature and humidity in places like greenhouses, wine cellars, or various rooms in your home. It features a high-quality Swiss sensor that provides accurate readings within ±0.54°F for temperature and ±3% for humidity, updated every 2 seconds to deliver timely and reliable information.

You can monitor conditions remotely through the Govee Home app using stable WiFi or Bluetooth connections, although it does not support 5G WiFi networks. Alerts can be set to notify you when levels go outside your chosen range; however, setting these alerts requires a Bluetooth connection, meaning you need to be nearby initially to configure them. The device also offers data storage and export capabilities, storing up to 20 days of data online for quick access and allowing export of up to 2 years of detailed history—ideal for spotting trends or maintaining records.

Powered by 3 AA batteries (included), the sensor offers flexible placement without the need for power outlets. It comes in a 2-pack with lanyards for easy hanging or positioning. While the alert setup isn’t fully remote and the sensor is made of plastic—which is typical but not extra durable—this sensor provides a user-friendly and dependable solution for precise, easy-to-use monitoring with extensive data logging and remote viewing.

The ecobee Smart Thermostat Premium is a versatile device that combines the functionalities of a smart thermostat and a smart humidity sensor. It features high accuracy in temperature control, which helps maintain comfort in your home. The included SmartSensor improves temperature regulation by addressing hot or cold spots, enhancing comfort. Connectivity options are robust, with compatibility for Siri, Alexa, and Google Assistant, allowing seamless integration into various smart home ecosystems.

The device supports Wi-Fi and Bluetooth for efficient communication and control via app or voice commands. It uses a lithium-ion battery, ensuring reliability and longevity, though it requires wired installation, which might be a bit cumbersome for some users. The thermostat's built-in air quality monitor and smoke alarm detection provide valuable insights and alerts, making it a comprehensive home monitoring hub.

Notifications are prompt, helping you stay informed about potential issues like poor air quality or sudden temperature drops. However, to access some advanced features like security alerts and automatic pauses in heating/cooling when a door/window is left open, additional sensors and a subscription to the ecobee Smart Security plan are required. While the device excels in integration, connectivity, and alerts, its primary focus remains on temperature control and air quality monitoring rather than being a dedicated humidity sensor.