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.

This indoor-outdoor wireless thermometer and hygrometer is a solid choice for greenhouse monitoring, offering a wide temperature range (-40ºF to 158ºF outdoor) and decent accuracy (+/-1.8ºF for temperature, +/-5% for humidity). The inclusion of three outdoor sensors allows tracking conditions at multiple spots in or around your greenhouse. It updates data reliably up to 330 feet away every 30 seconds, covering most greenhouses easily.

The 4.5-inch LCD display with adjustable backlight makes it easy to read temperature and humidity indoors, while the comfort indicator plus alerts for outdoor conditions provide useful real-time notifications. It supports both USB power and batteries, giving flexibility in placement. Although the accuracy is good, it isn’t the highest available for precise greenhouse work where tighter control might be needed.

The alert system is basic but should suffice for most home gardeners. If you want a straightforward, easy-to-use device with wireless sensors and clear readings, this unit fits well—but for advanced data management or top-tier precision, other models might be better.

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.