10 Best Temperature Data Loggers for Greenhouses in 2026: Smart Monitoring Picks

Stable temperature and humidity are essential for healthy greenhouse crops, but conditions can change quickly when vents open, heaters cycle, or weather shifts. A reliable data logger helps you spot problems before plant stress becomes visible.

We compared 10 greenhouse-ready options across wireless alerts, recording capacity, sensor accuracy, connectivity, display quality, and long-term usability. The right choice depends on whether you need remote monitoring, simple downloadable records, or a low-maintenance sensor for everyday checks.

Best 10 Temperature Data Loggers for Greenhouses Picks for 2026

Best Remote Monitoring Pick – Temp Stick WiFi Temperature & Humidity Sensor

For greenhouse owners who need temperature data loggers for greenhouses with alerts from anywhere, the Temp Stick combines WiFi monitoring, humidity tracking, and ongoing data logging without a subscription. It runs on two AA batteries and supports automated reports, though it requires a 2.4 GHz WiFi network.

Best For: Remote greenhouse monitoring where immediate text, email, and app alerts are priorities.

Pros:

• No subscription required for monitoring and alerts.
• Provides unlimited text alerts, multiple alert thresholds, and scheduled alert controls.
• Records data while temporarily offline and can upload up to one month of stored data after reconnection.
• Battery life is rated at one to two years with two AA batteries.

Cons:

• Works with 2.4 GHz WiFi only.
• Requires WiFi and is not intended for public or guest networks.

The Temp Stick is a strong choice when remote alerts matter more than a standalone USB download workflow. Its long battery life and automated reports make it practical for unattended greenhouse checks.

Best Long-Range Option – YoLink X3 Outdoor Thermometer Hygrometer Kit

The YoLink X3 is one of the more flexible temperature data loggers for greenhouses, pairing a sensor with a hub for app-based temperature and humidity monitoring. Its LoRa-based connection is suited to longer distances, while offline logging preserves readings when the sensor is temporarily disconnected.

Best For: Greenhouses needing long-range communication, app notifications, and extended battery life.

Pros:

• Includes a hub and supports monitoring through the YoLink app without a subscription.
• Offers smartphone push, email, and SMS notifications for set conditions.
• Provides offline data logging and up to a five-year battery life.
• Rated for an operating range of -22°F to 140°F, with temperature accuracy of ±0.54°F.

Cons:

• The sensor is not waterproof and needs protection from rain, standing water, condensation, and excessive moisture.
• Humidity voice queries through Alexa are not supported.
• The kit requires the included hub for remote connectivity.

This kit stands out for larger or harder-to-reach greenhouse layouts where standard WiFi coverage may be limiting. Install the sensor in a sheltered location to avoid moisture-related damage.

Best High-Capacity Logger – Supco DVTH Temperature & Humidity Data Logger

For buyers seeking temperature data loggers for greenhouses that emphasize local records and trend review, the Supco DVTH offers a graphic display and storage for more than 40,000 data points. Included software supports downloading records to a PC for organized analysis.

Best For: Greenhouse operators who want high-capacity historical records, on-device readings, and PC-based reporting.

Pros:

• Stores over 40,000 temperature and humidity data points.
• Displays real-time readings and supports scrolling graphs for trend review.
• Offers temperature accuracy of ±1°F (0.5°C) and humidity measurement from 0% to 99% RH.
• Includes alarm alerts and PC data export software.

Cons:

• The supplied notes do not indicate WiFi, cellular, or remote alert connectivity.
• Data downloads require connection to a PC and the included software.

The DVTH is a practical record-keeping tool rather than a remote notification system. Its large storage capacity and visual trend features suit growers who regularly retrieve data for review.

Best Portable USB Logger – Elitech RC-51H Temperature Data Logger

The Elitech RC-51H is a compact reusable recorder for greenhouse checks, with programmable logging intervals, alarm ranges, and temperature units. Its pen-shaped, IP65-rated housing is designed to fit into tight spaces, while the display shows current, minimum, and maximum readings.

Best For: Portable spot monitoring and exportable temperature records in protected greenhouse locations.

Pros:

• Stores up to 32,000 temperature and humidity points.
• Exports data as a PDF without requiring software for quicker retrieval.
• Allows adjustment of temperature units, alarm range, and logging interval.
• Reusable IP65-rated pen-shaped design is compact and dust- and water-resistant.

Cons:

• Its upper temperature range is 60°C (140°F), so placement should account for greenhouse heat.
• Advanced functions require Elitechlog software.
• The supplied notes do not describe WiFi or real-time remote alerts.

The RC-51H works well when you need a small logger that can be moved between greenhouse zones and quickly turned into a PDF report. It is better suited to local inspection than continuous remote supervision.

Connected Greenhouse Monitoring – GS1-A Smart WiFi Thermometer Hygrometer

For growers who want temperature data loggers for greenhouses with remote access, the UbiBot GS1-A combines temperature and humidity monitoring with WiFi connectivity. It supports historical records, exports, reports, device sharing, and alerts, while its IP65 enclosure suits dusty agricultural environments.

Best For: Greenhouse operators needing remote temperature and humidity visibility, automated alerts, and exportable records.

Pros:

• Measures temperature from -4°F to 140°F and humidity from 0% to 100% RH, with stated accuracy of ±0.2°C and ±2% RH.
• Provides app and web-console access, historical data, PDF/CSV exports, scheduled reports, and free 200MB cloud storage.
• IP65 protection helps shield the device from dust and low-pressure water jets.
• Supports customizable notifications through email, app alerts, HTTP, API, Alexa, and IFTTT.

Cons:

• Requires 2.4GHz WiFi for connected monitoring.
• Does not support external sensor expansion.
• Its advanced features may be more than needed for simple local temperature logging.

The GS1-A is a strong choice when a greenhouse monitoring setup needs connectivity, reporting, and configurable alerts in addition to basic readings. Consider another model if you specifically need expandable external sensors.

Wide-Range Temperature Logging – Supco SL300T Data Logger

The Supco SL300T is a compact option for growers comparing temperature data loggers for greenhouses without needing humidity measurements or cloud connectivity. It records temperatures from -40°F to 185°F and offers configurable start and memory behavior for short-term or continuous monitoring.

Best For: Greenhouse, refrigeration, storage, and other applications requiring straightforward temperature-only recording.

Pros:

• Wide operating and recording range from -40°F to 185°F (-40°C to 85°C).
• Supports PC, delayed-start, and push-button operation.
• Selectable memory rollover or stop-on-full settings accommodate different logging needs.
• Compact 3-inch design with USB connectivity fits tight spaces.

Cons:

• Records temperature only, with no humidity monitoring listed.
• Does not provide the WiFi access or app alerts offered by connected models.
• The supplied notes do not specify its temperature accuracy.

The SL300T is a practical, compact logger for documenting temperature conditions and handling broad temperature ranges. It is best suited to buyers who prefer configurable local recording over remote monitoring features.

Simple WiFi Plant Monitoring – Smart WiFi Hygrometer Thermometer

This smart WiFi monitor is a convenient choice for growers seeking temperature data loggers for greenhouses with a local display and phone-based access. It tracks temperature and humidity over time, supports app alerts and exports, and allows manual calibration for ongoing environmental checks.

Best For: Home greenhouse users who want visible readings, app notifications, and historical trends in a compact monitor.

Pros:

• Displays temperature and humidity locally on a clear LCD screen.
• Offers real-time 2.4GHz WiFi monitoring, app alerts, and daily, weekly, and monthly trends.
• Supports data export and manual temperature and humidity calibration.
• Works with Alexa and Google Assistant for voice-based checks.

Cons:

• Supports 2.4GHz WiFi only and is not compatible with 5GHz networks.
• Its stated temperature accuracy is ±1°C, which is less precise than the GS1-A’s listed specification.
• Uses two AAA alkaline batteries, so battery replacement is part of maintenance.

The monitor balances simple on-device viewing with useful connected features, making it appealing for smaller greenhouse setups and plant-care tracking. Choose a more rugged logger if your installation requires a stated IP-rated enclosure.

Best Value USB Logger – Elitech RC-5 Temperature Data Logger

The Elitech RC-5 is a straightforward option for recording temperature in a greenhouse or other indoor/outdoor setting. It stores up to 32,000 readings, covers -30°C to 70°C (-22°F to 158°F), and connects directly to a computer through its built-in USB connector for data downloads and PDF reports.

Best For: Growers who want a reusable, standalone temperature logger with an onboard display and simple USB reporting.

Pros:

• 32,000-point capacity with a broad -30°C to 70°C measuring range.
• Built-in USB connector requires no separate cable or reader for downloads.
• LCD shows temperature data, logged points, and alarm status.
• IP65 protection, temperature alarms, and a replaceable battery support repeated use.

Cons:

• Records temperature only; humidity monitoring is not included.
• Data transfer and Fahrenheit/Celsius switching use the free software rather than a wireless connection.

Choose the RC-5 when dependable local recording matters more than remote alerts. Its display and USB workflow make it practical for checking conditions and creating reports without adding a hub or app.

Best for Phone Alerts – Wireless Bluetooth Greenhouse Sensor

This compact Bluetooth sensor adds temperature and humidity tracking to a greenhouse monitoring setup. It records readings every minute, syncs with a phone, and can send alerts when conditions move outside your chosen limits, while historical data can be viewed in the app and exported as a CSV file.

Best For: Growers who prefer phone-based monitoring and alerts for temperature and humidity rather than a standalone USB logger.

Pros:

• Automatically records temperature and humidity every minute.
• Phone alerts can help identify greenhouse condition changes promptly.
• App provides historical graphs and CSV export for Excel or Google Sheets.
• Bluetooth range is up to 330 feet in suitable conditions, and the sensor can sync stored data after being out of range.

Cons:

• Bluetooth only; it is not a Wi-Fi device.
• Walls and other obstructions can reduce the stated range.
• Temperature accuracy is listed as ±1°F and humidity accuracy as ±3%.

The T3 is a good fit when timely phone notifications and long-term app history are priorities. Because it relies on Bluetooth, confirm that the sensor will regularly be within range of the phone used for syncing.

Best Dual-Probe Recorder – Tzone Temperature and Humidity Logger

The Tzone HTD702 is a versatile choice for temperature data loggers for greenhouses when you need both temperature and relative humidity measurements. Its two external probes use 1.5-meter cables, while the unit records up to 49,920 groups and can generate TXT, CSV, XLS, or PDF reports through USB.

Best For: Greenhouse, grow-tent, and incubation setups that need dual-probe temperature and humidity logging with detailed reports.

Pros:

• Measures temperature and humidity simultaneously with dual external probes.
• Wide temperature range of -40°C to 125°C and humidity range of 0% to 100% RH.
• Supports TXT, CSV, XLS, and PDF report generation without software.
• Offers audible alarms, LCD MAX/MIN/AVG readings, adjustable settings, and 49,920-group capacity.

Cons:

• Its handheld design and external probes require more setup space than a compact single-sensor logger.
• Uses three AA batteries, adding more battery bulk than small coin-cell models.
• The listed unit weighs 3.26 pounds, so it is less suited to minimal portable installations.

Consider the HTD702 when comparing conditions at two probe locations or tracking both heat and humidity. Its alarms and multiple report formats make it particularly useful for documenting greenhouse conditions and responding to changes quickly.

How We Picked the Best Temperature Data Loggers for Greenhouses

We evaluated these Temperature Data Loggers for Greenhouses based on the features that matter in real growing environments: temperature and relative-humidity measurement, recording capacity, alert options, data access, sensor placement, power requirements, and ease of reviewing historical readings. Wi-Fi models received particular attention for remote alerts, while USB and Bluetooth units were considered for lower-cost monitoring and offline recordkeeping.

We also looked for practical details such as weather resistance, calibration support, reusable storage, readable displays, app sharing, scheduled reports, and whether a hub or subscription is required. No single logger is ideal for every greenhouse, so the best option depends on the size of the growing space and how quickly you need to respond to abnormal readings.

Quick Comparison

• Best for remote alerts: Wi-Fi models that send app, email, or text notifications when readings leave a set range.
• Best for simple recordkeeping: USB data loggers with large storage capacity and downloadable temperature histories.
• Best for multiple growing areas: Hub-based systems that support device sharing, scheduled reports, or several sensors.
• Best for quick visual checks: Models with a built-in LCD or graphic display.
• Best for flexible placement: Bluetooth or wireless sensors that avoid running cables across benches and walkways.

Key Buying Factors for Temperature Data Loggers for Greenhouses

Temperature and Humidity Range

Choose a sensor rated for the temperatures and humidity levels your greenhouse can reach. Humidity measurement is especially useful for spotting condensation and disease-favorable conditions, while temperature range matters near heaters, vents, and exterior walls.

Alerts and Remote Access

If the greenhouse is unattended for long periods, prioritize Wi-Fi monitoring with customizable high and low alerts. Text, email, and app notifications can help you respond to heater failures or overheating before plants are damaged. Confirm that the sensor remains connected where it will be installed.

Data Storage and Reporting

Check how many readings the device stores, how often it records, and how data is exported. USB loggers are useful when you need a report without cloud access; connected systems are more convenient for live dashboards, sharing, and scheduled summaries.

Power, Durability, and Placement

Battery life, charging requirements, and enclosure protection affect maintenance. Place the sensor away from direct sunlight, irrigation spray, heaters, and exterior drafts. For humid environments, look for a suitable IP rating and protect any hub or computer connection from moisture.

Who Should Buy Which Temperature Data Loggers for Greenhouses?

Choose a Wi-Fi logger if you need immediate alerts and remote access from home or work. Choose a USB model if your priority is inexpensive, dependable historical data collection. Choose a Bluetooth unit for short-range checks in smaller structures. Choose a hub-based system if you plan to monitor several zones or share readings with staff. For valuable crops, using a connected primary sensor alongside a separate local display or backup logger can provide useful redundancy.