The clearest statewide peak usually shows up in July to August. The biggest statewide split is between the South and the North. Yuma is one of the strongest higher-WBGT examples in the state, while Flagstaff is a useful contrast. A statewide average will miss how different one region or city can feel from another.
Arizona is best understood as a contrast page rather than a single statewide pattern. The most persistent side tends to be the South, while the North is the clearest lower-WBGT contrast. Cities like Yuma and Flagstaff help show why one statewide assumption can be misleading.
In Arizona, the better planning question is usually where you are, not just what month it is. Statewide context helps, but city pages are much more useful when Yuma and Flagstaff can behave so differently.
Klimo WBGT provides real-time Wet Bulb Globe Temperature monitoring to help athletes, workers and outdoor enthusiasts protect themselves from heat-related illness.
Wet Bulb Globe Temperature (WBGT) is a measure of heat stress that accounts for temperature, humidity, wind speed and sun angle. Rather than relying on the air temperature or the heat index, WBGT captures how the human body actually experiences heat, making it the gold standard for outdoor activity safety decisions.