Look up the exact time darkness falls in Groton, Connecticut for any date of the year. Sunset times, civil dusk, full twilight schedule, and daylight changes.
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Today — Wednesday, November 4, 2026
It gets dark at 05:08 PM in Groton
Sunrise
06:23 AM
Sunset
04:39 PM
Gets Dark
05:08 PM
Day Length
10h 16m
Groton is losing 2m 22s of daylight per day
Darkness arrives earliest on December 7 at 4:49 PM and latest on June 26 at 8:59 PM, a swing of 4 h 10 min across the year.
The longest day brings 15 h 10 min of daylight and the shortest just 9 h 11 min. The earliest dusk comes about 14 days away from the shortest day, because Earth's oval orbit shifts solar noon through the year.
After sunset, twilight lasts about 28 min at the March equinox and stretches to 34 min in midsummer. Near the equator it is only about 21 min year-round.
In Groton, on 115 days it is dark before 6 pm.
Groton sits close to the middle of its time zone, so the sun is highest within 14 min of noon on standard time.
Groton lies 4,598 km (2,857 miles) north of the equator at 41.35°N. That is almost the same latitude as Denver, so both see a similar yearly rhythm of daylight.
This page shows exactly when it gets dark in Groton, Connecticut, United States for any day of the year. The interactive tool above lets you pick any date to see the precise sunset time, civil dusk (when true darkness begins), and the full twilight schedule including nautical and astronomical dawn and dusk.
Groton is located at latitude 41.35° and longitude -72.04°. The time darkness falls changes throughout the year based on Earth's axial tilt — earlier in winter, later in summer. Use the date picker above to check any date.
Whether you're planning trick-or-treating for Halloween, a fireworks display, an outdoor wedding, or an evening event in Groton, knowing the exact time darkness falls is essential. This tool calculates civil dusk — when the sun drops 6 degrees below the horizon — for any date at Groton's exact coordinates.
The site also shows the daily daylight delta — how much daylight Groton is gaining or losing each day — and a year-long daylight curve showing how day length rises and falls across all 365 days.