Chicago, IL

Civil, nautical, and astronomical twilight each mark a different stage of darkness: civil twilight is still light enough to work outside without lamps; nautical twilight is when the sea horizon fades but the brightest stars are already out; astronomical twilight ends when the sky is fully dark and faint deep-sky objects become visible.

Times shown are computed live for Chicago, IL (41.88°, -87.63°) using the Sun's position for today's date, and use your local time zone (America/Chicago) automatically, including daylight saving where applicable.