Sunrise 5:57 am and sunset 6:05 pm in Imperatriz

Today, Sunday, September 27, 2026, the sun rises in Imperatriz, Brazil at 5:57 am and sets at 6:05 pm. That is 12 hours 8 minutes of daylight, with the sun at its highest at 12:01 pm. Imperatriz is holding 18 seconds of daylight a day at the moment.

Sunrise time Imperatriz

The sun rises in Imperatriz, Brazil at 5:57 am today. That is the moment the top edge of the solar disc first clears a flat horizon, which is the definition every almanac uses and the one the times here are computed to. The sky starts to lighten well before that: civil twilight, the point at which you can read outside without a light, begins at 5:36 am.

Sunrise here is moving earlier at the moment. Over the year the earliest sunrise in Imperatriz falls on November 12, 2026 at 5:43 am, and the latest on July 18, 2026 at 6:21 am. Neither of those dates is the solstice, and that surprises people. The longest day in Imperatriz is December 21, 2026, but the earliest sunrise and the latest sunset never sit exactly on it, because the equation of time slides underneath the whole pattern.

Sunset time Imperatriz

The sun sets in Imperatriz, Brazil at 6:05 pm. Light lingers after that: civil twilight runs until 6:26 pm, and full darkness, meaning the end of astronomical twilight, arrives at 7:14 pm.

The latest sunset of 2026 in Imperatriz is on February 1, 2026 at 6:34 pm, and the earliest is on May 22, 2026 at 6:02 pm. The gap between those two readings is the whole story of the year in one line, and it is wider here than at a city nearer the equator and narrower than at one nearer the pole.

Daylight and solar noon in Imperatriz

Daylight today runs to 12 hours 8 minutes, from sunrise to sunset. Solar noon, the instant the sun crosses the local meridian and stands at its highest, is at 12:01 pm, which is 1 minute after clock noon. That gap is not an error. It is Imperatriz sitting at 47.49 degrees west while its clock is set to America/Fortaleza, plus the equation of time, which today is 9.0 minutes ahead of mean time.

The sun's declination today is -1.80 degrees, meaning it stands directly overhead at that latitude somewhere on the globe. Imperatriz is at 5.53 degrees south, within eight degrees of the equator, which is why the day here is 12h 08m rather than the flat twelve hours the equator gets. Across 2026 the length of the day in Imperatriz swings by 39 minutes, from 11h 48m on June 21, 2026 to 12h 27m on December 21, 2026.

Sunrise and sunset in Imperatriz month by month

The table below is the 15th of each month of 2026, computed for Imperatriz, Brazil rather than for the zone as a whole. Reading down the daylight column shows the shape of the year: long days around January, short days around July, because the southern hemisphere runs the opposite way round.

The extremes of the year in Imperatriz

The sun rises and sets on every one of the 365 days of 2026 in Imperatriz. No day here is ever entirely without a sunrise, which starts to happen only above roughly 66.56 degrees of latitude.

Golden hour and blue hour in Imperatriz today

Golden hour is the stretch when the sun sits between six degrees above the horizon and four below it, which is when the light is low, warm and soft. Blue hour follows it, from four degrees below down to six, when the sun is gone but the sky still carries a blue cast. Both happen twice a day, once either side of sunrise and sunset.

Neither is literally an hour. Each band is as long as the sun takes to cross those few degrees, so it is short near the equator where the sun drops steeply and long at high latitude where it slides in at a shallow angle. This evening it runs 40 minutes in Imperatriz.

Twilight times in Imperatriz today

Twilight is longer the further a place is from the equator, because the sun cuts down through the horizon at a shallower angle. In Imperatriz the stretch from the start of civil twilight to sunrise is 21 minutes.

Solstices and equinoxes in Imperatriz

The equinoxes are the useful sanity check on any sun calculation: on those two days every place on Earth gets close to twelve hours between sunrise and sunset. It is not exactly twelve, and the reason is the same refraction and disc-edge convention that sets the times on this page. Sunrise is timed when the upper limb appears rather than the centre, and the atmosphere bends the image of the sun up over the horizon before it is geometrically there, so both ends of the day are pushed outwards by a few minutes. The seasons page has the exact instants.

How these times are worked out

The times on this page come from the NOAA solar position algorithm, the standard reduction of the calculations in Meeus's Astronomical Algorithms. The chain is short and has no fitted constants in it: the sun's mean longitude and mean anomaly at the instant, the equation of centre to get from the mean to the true position, a correction for nutation to get the apparent longitude, the true obliquity of the ecliptic, and from those two the declination and the equation of time. Sunrise and sunset are then solar noon plus and minus the hour angle at which the sun reaches an altitude of -0.833 degrees.

That number, -0.833, is doing real work. Half of it, -0.2667 degrees, is the apparent radius of the sun, because sunrise is defined by the upper edge of the disc and not its centre. The other -0.5667 degrees is mean atmospheric refraction at the horizon, which lifts the image of the sun by roughly its own diameter. Ignore both and every sunrise on this site would be three or four minutes late and every sunset three or four minutes early.

The conversion into America/Fortaleza is done through the IANA time zone database that ships inside Node, at the actual instant of the event, so daylight saving, half hour offsets and rule changes are all handled by the database rather than by an offset written down here. Imperatriz does not move its clocks at all. The zone stays at UTC-3 all year, so every change in the table above is the sun moving and not the clock.

Questions

What time is sunset in Imperatriz?

6:05 pm today, September 27, 2026.

What time is sunrise in Imperatriz?

5:57 am today.

When is golden hour in Imperatriz today?

The evening golden hour runs 5:37 pm to 6:18 pm, and the morning one 5:44 am to 6:24 am.

What time does the sun set in Imperatriz today?

At 6:05 pm on September 27, 2026.

What time does the sun rise in Imperatriz today?

At 5:57 am, giving 12 hours 8 minutes of daylight.

How many hours of daylight does Imperatriz get today?

12 hours 8 minutes, and the city is holding 18 seconds of daylight a day.

Why is solar noon in Imperatriz not at 12:00?

Because Imperatriz sits at 47.49 degrees west while its clock is set to a zone meridian somewhere else, and because the equation of time shifts apparent noon by up to about 16 minutes either way through the year. Today the two effects put solar noon at 12:01 pm.

When is the longest day of the year in Imperatriz?

December 21, 2026, with 12 hours 27 minutes of daylight. The shortest is June 21, 2026 with 11 hours 48 minutes.

Are these times adjusted for daylight saving?

Imperatriz does not observe daylight saving, so the question does not arise. The zone stays at UTC-3 all year.

Sunrise and sunset in nearby cities

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