During triple-digit temperatures, the best time to walk outdoors is early in the morning, typically before 8 a.m. This is when the air is coolest, the sun is low in the sky, and heat-related health risks are at their lowest. At this time, surfaces like pavement haven’t yet absorbed and radiated the sun’s heat, making it safer for your body and more comfortable on your feet. Morning walks also allow your body to energize naturally with sunlight exposure while avoiding intense UV radiation and dehydration.
If mornings aren’t an option, the next best window is after sunset, usually after 8 p.m., when temperatures begin to drop and direct sun exposure is gone. However, evening walks may still be warmer than mornings since the ground and air have accumulated heat throughout the day. No matter the time, wearing light-colored, breathable clothing, staying hydrated, and listening to your body’s signals are essential. In extreme heat, indoor walking alternatives like malls or gyms may be safest overall.
