Explore how heat conditions across all eight THSADA regions compared to UIL activity guidelines impact practices and games during what times of the day.
How to use this tool
Select your THSADA region to see heat data from August 2025 — including how many days each hour of the day reached each UIL activity zone, and how average peak WBGT shifted throughout the day.
Click Your Region
Select one of the eight THSADA regions to filter data for your area.
Review Days in Each Zone
Each color shows how many days that hour fell into a UIL activity zone.
Switch to Avg. Max WBGT by Hour
See the average peak WBGT at each hour to spot the hottest parts of the day.
See How Your Practices Were Affected Last Year
Below the chart, see how many hours between 6 a.m.–8 p.m. fall into each zone.
Data is sourced from Perry Weather’s network of approximately 700 on-site weather stations across Texas, recorded every 5 minutes.
This data covers all 8 THSADA regions across Texas for August 2025 — one of the most demanding months of the fall athletics calendar. Each chart shows how often, and during which hours of the day, heat conditions would have required activity adjustments under UIL’s WBGT-based heat policy. Use the region selector to compare heat exposure across the state and see exactly how many August days each hour of the day reached each activity restriction level.
Data from ~700 Perry Weather on-site stations across Texas, recorded every 5 minutes with WBGT monitoring sensors. Average maximum WBGT by hour, August 2025. Zone thresholds per UIL Heat Policy guidelines.
WBGT isn’t a standard thermometer reading. It combines air temperature, humidity, wind speed, and radiant heat from the sun into a single number that reflects what the human body actually experiences outdoors — which is why it’s more meaningful for athletic settings than a heat index alone.
UIL uses WBGT to define five activity zones, each with different requirements for practice duration, rest breaks, and athlete monitoring.
The table below outlines UIL-recommended activity modifications based on WBGT readings for Class 2 and Class 3 regions in Texas. As temperatures rise, schools are required to reduce practice duration, increase rest breaks, and ultimately suspend outdoor activities altogether.
