Sun Times in O'Fallon

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

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

Golden hour times for O'Fallon 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 O'Fallon is shown above. It represents the time between sunrise and sunset.

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

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

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

The earliest sunrise in O'Fallon in 2026 is at 10:36 AM on June 6 (). This occurs around the summer solstice when days are longest.

The latest sunset in O'Fallon in 2026 is at 11:52 PM on February 28 (). This occurs shortly after the summer solstice.

After sunset in O'Fallon, 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.