4 Best Min Max Thermometer For Greenhouse 2025 in the United States

The ThermoPro TP359 Bluetooth Hygrometer Thermometer is a solid choice for tracking temperature and humidity in a greenhouse. Featuring a highly accurate Swiss-made Sensirion sensor, it offers precise measurements with a temperature accuracy of +/-0.5F and humidity accuracy of +/-2%RH. This means you can trust it to detect even small fluctuations, which is essential for greenhouse environments.

The thermometer has a long-range Bluetooth capability of up to 260ft, making it convenient to monitor conditions remotely via a smartphone app. The app not only provides real-time readings but also allows you to store data for up to a year and set alerts for when conditions exceed your presets, ensuring timely interventions to protect your plants.

The large 3.5-inch backlit LCD screen is easy to read in various light conditions, and the soft yellow backlight reduces eye strain, adding to the user-friendly design. However, the mounting options are limited to tabletop use, which might not be ideal for all greenhouse setups. Additionally, the device relies on two AAA batteries, which are included, but it means regular battery changes could be necessary. It's lightweight and portable, weighing only 106 grams, making it easy to place anywhere. While it is an effective and highly accurate tool for greenhouse monitoring, the lack of varied mounting options and dependency on batteries are points to consider.

The Digital Greenhouse Thermometer by Thermometer World is a handy tool for monitoring the temperature in your greenhouse. It measures current, high, and low temperatures, helping you keep track of the environment for your plants. The digital display ensures readings are easy to read and understand. It also boasts a high accuracy feature, crucial for precise temperature management.

The thermometer records maximum and minimum temperatures, which is essential for understanding temperature fluctuations over time. The plastic outer material might not be as durable as other materials, making it less ideal for extremely harsh conditions. It is lightweight and compact, which is great for fitting into smaller spaces and is powered by a single AAA battery, which is included, making it ready to use straight out of the box.

This thermometer would be particularly useful for gardeners and greenhouse enthusiasts who need to monitor temperature ranges accurately without complicated setup or maintenance.

The Houkiper Min Max Thermometer is designed to help you keep track of temperature variations in your greenhouse. One of its notable strengths is its temperature range of -4 to 122°F, which is broad enough for most greenhouse settings. The thermometer updates every 10 seconds and boasts an accuracy of +/-1°C, ensuring you get precise readings quickly.

The digital LCD display is easy to read and allows you to switch between Celsius and Fahrenheit, catering to different user preferences. The memory function is another useful feature, as it keeps track of both the highest and lowest temperatures recorded, helping you monitor any significant fluctuations over time. This can be particularly beneficial in managing the delicate environment within a greenhouse.

Mounting is straightforward with the included hanging hole, giving you flexibility in placement; however, it might not be as robust as some other models when it comes to durability, given its plastic construction. The device requires AAA batteries, which are not included, so you’ll need to have those on hand. Despite some minor drawbacks, this thermometer is a good choice for indoor greenhouse use, offering accuracy and ease of installation.