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5 articles about heat.
The best summer run time depends on dew point, sun exposure, and heat stored in pavement, not the air temperature alone. Here is how I choose between a morning and an evening run, hour by hour.
Comfortable below 55°F, oppressive at 65°F, dangerous past 70°F. The dew point bands that tell you when to slow down, shorten the run, or move indoors.
How much to slow down in the heat, in real numbers: a few minutes on an easy run up to 15+ minutes on a hot marathon, plus when to run by effort not pace.
Humidity changes sweat cooling, not just sweat amount. Build a simple fluids + sodium plan by dew point, duration, and effort, with safety-first limits.
Choose running clothing by dew point, sun exposure, and airflow. Learn fabric and fit principles that improve cooling and reduce chafing in humid heat.