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 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.

The ThermoPro Hygrometer Thermometer TP350 is a versatile and user-friendly tool ideal for monitoring temperature and humidity in a greenhouse. One of its key strengths is its high accuracy with a margin of error of just ±0.9°F and ±2% RH, which ensures precise environmental readings. The 10-second refresh rate means it provides almost real-time data, which is essential for maintaining optimal greenhouse conditions.

The Bluetooth connectivity allows you to monitor these conditions from up to 260 feet away using the ThermoPro app, which is convenient and maintains user privacy as no registration is required. Furthermore, the device has a robust data storage feature, storing up to two years' worth of data, which is beneficial for tracking long-term trends and making informed decisions about your greenhouse environment.

The backlit display and comfort indicator with a face icon make it easy to read and understand the conditions at a glance, even in low-light situations. However, the product does require two AAA batteries, which are included, but it means you will need to replace them periodically. The lower temperature rating starts at 55°F, which might be limiting if your greenhouse requires monitoring in cooler conditions. Despite these minor drawbacks, the ThermoPro TP350 is a reliable and efficient choice for those looking to maintain optimal growing conditions in their greenhouse.