10 Best Smart Thermometer For Greenhouse 2025 in the United States

The Govee Indoor Hygrometer Thermometer is a solid choice for those looking to monitor temperature and humidity levels, especially in a greenhouse setting. One of its standout features is its impressive accuracy, with temperature readings precise to ±0.54°F and humidity levels to ±3%RH. This level of accuracy is crucial for maintaining the ideal conditions for plant growth. Additionally, with a fast refresh rate of just 2 seconds, you’ll always have up-to-date information at your fingertips.

Connectivity is another strength, as the thermometer uses Bluetooth with a range of up to 196 feet, allowing you to receive immediate alerts through the Govee Home app if your preset temperature or humidity thresholds are breached. This feature ensures that you can take prompt action to protect your plants.

The large 3-inch LCD display is user-friendly, making it easy to read the current conditions at a glance. Plus, the ability to log data over 2 years and view it in a clear graph format can be beneficial for tracking trends in your greenhouse environment. However, the device operates on batteries, which means you'll need to keep an eye on battery life and potentially replace them over time. Additionally, while it offers 20 days of online data storage, some users may prefer unlimited storage for ongoing monitoring.

The SensorPush HT.w is a smart temperature and humidity sensor that fits well for greenhouse monitoring and other environments needing precise climate control. It covers temperatures up to 60°C, which is generally sufficient for most greenhouse conditions. Its Bluetooth connectivity allows easy setup and reliable data updates within about 100 meters in open spaces, though walls can reduce this range. For those who want remote access beyond Bluetooth range, an optional WiFi Gateway is available, which adds cloud storage and real-time monitoring from anywhere.

One of the strong points is the straightforward installation and user-friendly app, making it simple to track temperature, humidity, dew point, and vapor pressure deficit (VPD)—important factors for healthy plant growth. It also stores up to 45 days of data directly on the device and offers unlimited storage in the app, which is useful for long-term monitoring and pattern analysis. Alerts for unusual conditions can be sent to your phone, helping you react quickly to any issues.

The sensor is splash-resistant, so it can handle humid environments like greenhouses well, and the battery life of 1-2 years means low maintenance. It relies on Bluetooth for direct monitoring, so without the extra WiFi Gateway, you need to be near the sensor to check data, which might be limiting in larger greenhouses. While it measures both temperature and humidity, there are no additional sensors included (like soil moisture), which some greenhouse users might find helpful. This makes the SensorPush HT.w a reliable, easy-to-use smart thermometer and hygrometer providing accurate environmental data and good data logging suited for small to medium greenhouses. It is especially useful if you want hassle-free setup and dependable readings, though for full remote access you’ll need to invest in the WiFi Gateway separately.

The Inkbird WiFi ITC-308 Digital Temperature Controller Thermostat is designed to meet the needs of greenhouse owners with its comprehensive feature set. Its temperature range and accuracy are crucial for maintaining optimal growing conditions. The dual relay outputs can control both heating and cooling devices, which is ideal for dynamic greenhouse environments. The device supports both Celsius and Fahrenheit readings and allows for temperature calibration, enhancing its precision.

Remote monitoring through the INKBIRD app, compatible with both iOS and Android platforms, adds a layer of convenience, enabling users to manage the greenhouse environment from anywhere using a 2.4 GHz Wi-Fi connection. High and low-temperature alarms provide timely alerts for any temperature deviations or sensor malfunctions, ensuring prompt corrective actions can be taken. The plug-n-play design makes it user-friendly and straightforward to install without the need for professional assistance.

Its power source supports up to 1100 W (110 V), which should be adequate for most greenhouse heating or cooling equipment. The Inkbird WiFi ITC-308 provides a reliable, user-friendly solution for greenhouse temperature control, with its major strengths being remote access, dual control capabilities, and alert systems.