Perry Weather Perry Weather
Log in
Try it free
How it Works
Features
Explore All Features
Explore Perry Weather's on-site weather hardware and connected software platform.
Lightning Detection
Automated instructions for your team when lightning approaches
perry weather heat
Heat Stress Monitoring
On-prem WBGT & heat index monitoring, no handhelds required
Outdoor Warning System
Manage all emergency response communications through one system
perry weather location
On-Site Weather Station
Base your alerts and actions on real-time conditions at your specific location
Weather Monitoring & Alerting Software
Monitor the weather on web dashboard and mobile app
24/7 On-Call Meteorologists
Get proactive forecasts or request meteorologist support
Industries
Holder Construction Workers preparing construction materials to be lifted on a crane
Featured Case Study
Reducing workloads and increasing worker safety at Holder Construction’s Project Red
High School Athletics
Automate weather guideline compliance without the hassle
Youth Camps
Protect campers with accurate lightning detection
construction perry weather
Construction
Eliminate weather related incidents and minimize delays
Manufacturing
Heat stress and severe weather monitoring for key facilities
Parks & Recreation
Keep parks and patrons safe, even when you're not there
Golf & Resorts
Protect golfers and keep play on pace without false alarms
Pricing
Resources
Contact Us
Reach out to us for sales or support questions
Case Studies Icon
Case Studies
See what our customers say about us
About Perry Weather
Learn about the story of Perry Weather and our mission
Blog
Read about weather trends, best practices, and news
Jobs
See open roles and apply to work with us
Support Center
Submit a support ticket or watch tutorial videos
Log in
Try it free

California WBGT Monitoring System

On-site WBGT monitoring system that alerts your entire team

Perry Weather automatically tracks Wet Bulb Globe Temperature, air quality, lightning, precipitation and alerts your team so you can stay compliant and keep your team safe.

  • Automated WBGT alerts

  • Complies with California guidelines

  • Records WBGT every 5 minutes

Official Partner of the California Interscholastic federation
Official Partner of the California Interscholastic federation

on-site wbgt monitoring

Effortless California Heat Stress Policy Compliance

Perry Weather provides precise on-site WBGT and Heat Index monitoring with real-time alerts. Stay ahead with instant notifications the moment heat exceeds your organization’s safety standards.

Accurate on-site measurements

WBGT offers a clearer and more precise understanding of real-world conditions than heat index, ensuring safety and informed decision-making for all outdoor activities.

Automated data recording

WBGT measurements are automatically recorded and stored, ensuring you stay compliant without the tediousness and potential errors of traditional manual methods.

Actionable heat stress alerts

We translate data into practical steps based on heat stress policies and local regulations. From hydration reminders to activity adjustments, we ensure safety first.

Trusted by thousands of organizations

San Fransisco Unified School District

WBGT and Heat Index Monitoring

On-site Heat Stress Monitoring for Precise Readings

Set it and forget it

Never worry about having to set up tripods or do readings every 15 minutes during outdoor activities again. Perry Weather automatically monitors WBGT and records readings every 15 minutes, so you can ensure you’re in compliance without the hassle.

Accurate black bulb sensor

Perry Weather stations include a precise WBGT monitor with a large 3.5″ black bulb sensor, offering more reliable readings than smaller handheld devices.

Eliminate human errors

Competing handheld devices are prone to inaccuracies due to factors like shadows and calibration errors. Perry Weather’s stationary unit minimizes these issues, ensuring consistent and dependable heat readings by eliminating human errors

How WBGT monitoring works

How it works

Heat stress policy based alerts

Automatic instructive alerts and warnings that are triggered based on your policies, keeping you compliant and confident in your decision-making so everyone on your staff knows exactly what to do when WBGT levels are high.

  • Automated warnings: Push notifications and text message alerts with automatic action instructions once WBGT threshold is breached

  • Custom quiet times: Pause notifications during weekends or nighttime, ensuring disturbance-free periods for when practices and games aren’t taking place

  • Configurable settings: Configure specific user and warnings settings that fit your organizational needs

Ensure compliance with historical WBGT reports

Perry Weather automates the process of monitoring Wet Bulb Globe Temperature (WBGT) by recording its values every 15 minutes, eliminating the need for manual note-taking or logging.

  • WBGT values are automatically saved every 15 minutes

  • Export historical WBGT values from any point in time

Predictive heat stress warnings so you can plan ahead

Get heat and WBGT risk updates based on your policies, so you’re not caught by surprise and are able to adjust outdoor activities accordingly.

Customer Stories

See more

How Loyola High School Automates CIF Heat Stress Policy Compliance

Refining EHS operations at Leeward’s Mojave Desert solar site

Leeward Renewable Energy Logo

Frequently asked questions

Have questions about how Perry Weather monitors WBGT and heat stress? Check out some of our frequently asked questions.

What is Wet Bulb Globe Temperature?

Wet bulb globe temperature measures heat stress in direct sunlight, giving a better idea of how the human body will react in hot and humid weather.
WBGT readings, unlike regular temperature readings, combine the effects of:
-ambient temperature
-wind speed
-relative humidity
-sun angle
-cloud cover (solar radiation)
Learn more about wet bulb globe temperature

Why do I need to monitor WBGT?

By taking in these other factors, WBGT is a more practical, accurate, and useful measurement of heat as it relates to the body, especially when dealing with outdoor activities and sports programs.

Said plainly, WBGT is the best measurement to prevent exertional heat stroke and the effects of extreme heat.

States like Georgia have begun mandating the use and monitoring of WBGT for all high school outdoor athletic programs. The University Interscholastic League (UIL) has recommended Texas athletic programs to start using WBGT and moving away from heat index.

How does Perry Weather measure Wet Bulb Globe Temperature?

There are two complex formulas involved in calculating Wet Bulb Globe Temperature. To truly get WBGT measurement right, having an on-site WBGT sensor like the one offered with Perry Weather’s weather station is the way to go. Perry Weather’s outdoor weather station is equipped with a more capable 3.5” diameter black bulb, providing precise and timely WBGT readings.

Why is Perry Weather better than handheld devices for measuring WBGT?

Unlike WBGT, heat index is a measurement that only takes into account air temperature and humidity. Think of it as the “feels-like” temperature in a shaded area. Heat Index is measured in the shade rather than the sun, and doesn’t factor in cloud cover (solar radiation), wind, or sun angle.

For situations where precision and heat safety are required, like in outdoor sports practice or outdoor events, WBGT is preferred. Learn more about heat index vs WBGT

How do we determine our WBGT policies?

If you need help crafting a heat stress and WBGT policy for your needs, Perry Weather offers policy consultations backed by expert meteorologists to make sure your policy is accurate, tailored, and comprehensive.

Learn more about how to craft a WBGT policy for your location

How do we know when our WBGT is too high for outdoor activities?

The data from the black bulb sensor on Perry Weather weather stations is reflected onto your user-friendly website and mobile dashboard. Depending on the reading and your policy, clear and instructive alerts are then delivered via SMS alerts, PA warnings, and more.

So, if your WBGT reading is at dangerous levels, your staff members can receive warning alerts to take action.

What’s the difference between Heat Index and WBGT?

Unlike WBGT, heat index is a measurement that only takes into account air temperature and humidity. Think of it as the “feels-like” temperature in a shaded area. Heat Index is measured in the shade rather than the sun, and doesn’t factor in cloud cover (solar radiation), wind, or sun angle.

For situations where precision and heat safety are required, like in outdoor sports practice or outdoor events, WBGT is preferred. Learn more about heat index vs WBGT

Say goodbye to weather uncertainty 👋

Try it free
Get more info
Platform
How It Works Lightning Detection & Alerts Heat Stress & WBGT Monitoring On-Site Weather Monitoring Station 24/7 Pro Meteorologist Service Severe Weather Alerts Air Quality Monitoring Historical Reporting Weather Monitoring & Alerting Software
Use Cases
Schools & Districts Cities & Park Districts Golf Clubs & Resorts Collegiate & Pro Athletics Manufacturing Youth Camps Construction Events & Entertainment Aviation Energy
Comparisons
Perry Weather vs. Thor Guard Perry Weather vs. Handheld Kestrels Perry Weather vs. Earth Networks Perry Weather vs. DTN WeatherSentry Perry Weather vs. StormGeo Perry Weather vs Free Weather Apps Perry Weather vs. Zelus Sports
Resources
Pricing Customer Stories Blog Help Center Terms & Conditions Compliance Documentation
Company
About Perry Weather Jobs Contact Us
© 2026 Perry Weather, Inc.