The clearest statewide peak usually shows up in July. The biggest statewide split is between the South and the North. Portsmouth is one of the strongest higher-WBGT examples in the state, while Berlin is a useful contrast. The risk window is usually tighter here, so timing matters as much as location.
New Hampshire's WBGT story usually compresses into a shorter midsummer window. July is often the clearest peak. The South comes through as the warmer side of the state, while the North is lighter overall.
For outdoor planning in New Hampshire, the higher-WBGT risk usually clusters into a shorter summer window. That makes timing and local context especially important when you are deciding how much attention a given city really needs.
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.