Dusk
Dusk in Larkspur, CA
Civil dusk in Larkspur is the moment the sun drops to 6° below the horizon after sunset — the official end of civil twilight, when the sky becomes too dark for most outdoor activity without artificial light. Here are today's dusk time and surrounding twilight windows for Larkspur, California (37.94°, -122.53°).
Sun, moon & horizon
12h 6m of daylight · computed locally with suncalc
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Dusk and twilight in Larkspur on September 23, 2026
Civil dusk in Larkspur on September 23, 2026 is at 7:31 PM — the moment the sun reaches 6° below the horizon and the sky loses its last usable natural light. That is about 26 minutes after the 7:05 PM sunset, the gap during which street lights and headlights start to take over.
Twilight then deepens in stages: civil dusk at 7:31 PM gives way to nautical dusk at 8:02 PM (sun 12° down, horizon fading) and finally astronomical dusk at 8:33 PM, after which the sky is fully dark for stargazing. The best photographic slice sits just before civil dusk — the 7:23 PM – 7:31 PM blue hour, when the sky glows an even cobalt.
How long that whole hand-off lasts depends on latitude: at 37.9°N, Larkspur sees a moderate seasonal change in day length, so twilight stretches out in autumn compared with the tropics. With the days are drawing in through September, dusk creeps a little earlier each evening. Step the date above to plan any night.
More for Larkspur
Gear for the shot
- Travel tripod Sharp frames in dim blue-hour light.
- Ball head Fast, precise recomposition on the tripod.
- Remote shutter release Avoid shake on long exposures.
- Headlamp Hands-free setup before dawn and after dusk.
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Dusk in nearby cities
Larkspur — frequently asked
- What time is dusk today in Larkspur?
- Dusk (civil twilight end) for Larkspur is shown in the Sun table above. It falls shortly after sunset — typically 20–30 minutes later depending on the season.
- What is civil twilight and how is dusk different from sunset?
- Sunset is the moment the sun's upper edge dips below the horizon. Dusk — or civil twilight end — is when the sun reaches 6° below the horizon, about 20–30 minutes later. Between the two, there is still enough natural light to read outdoors; after dusk, artificial lighting is typically needed.
- Is dusk a good time for photography in Larkspur?
- Yes — the window just before dusk is blue hour, offering even, cool light ideal for cityscapes, long exposures, and silhouettes against a deep-blue sky. The planner above shows the exact blue-hour and dusk windows for Larkspur today.