Days are about to get way shorter in September: How much daylight we're losing

As the month of September progresses, regions in the United States are experiencing a noticeable reduction in daily sunlight. While the total length of a standard day remains fixed at 24 hours, the duration of visible daylight is actively declining.

This seasonal shift occurs as the Northern Hemisphere transitions away from the summer months toward the autumnal equinox. The gradual loss of daylight is a predictable astronomical occurrence that affects daily routines and ambient temperatures across the country.