Sun Times in Boulder

Check the sunrise time displayed above for Boulder (). Times are calculated from the city's coordinates.

Check the sunset time displayed above for Boulder (). Times are calculated from the city's coordinates.

Golden hour times for Boulder are displayed above. Morning golden hour runs from sunrise until about an hour after. Evening golden hour starts about an hour before sunset.

The day length for Boulder is shown above. It represents the time between sunrise and sunset.

The sun's highest point (solar noon) for Boulder is shown in the times above (). This is when the sun crosses the meridian.

Sunset and dusk times for Boulder are displayed above (). It typically takes over an hour after sunset for the sky to get fully dark.

Twilight duration in Boulder varies by season. You can calculate it from the sunset and astronomical dusk times shown above.

The earliest sunrise in Boulder in 2026 is at 8:44 PM on December 4 (). This occurs around the summer solstice when days are longest.

The latest sunset in Boulder in 2026 is at 11:02 AM on January 4 (). This occurs shortly after the summer solstice.

After sunset in Boulder, civil twilight lasts roughly 30 minutes, during which the sky fades but remains somewhat bright. Full darkness follows after astronomical dusk. See the exact times above.