How long is the daylight duration in Hilo across different seasons?

Located at latitude 19.73°, Hilo lies within the tropical zone. As a result, day length remains remarkably steady throughout the entire year, fluctuating by less than an hour between the summer and winter solstices (typically around 11.5 to 12.8 hours).

When are the Golden Hour and Blue Hour in Hilo?

The morning Golden Hour begins at sunrise and lasts for approximately 45–60 minutes, while the evening Golden Hour starts about an hour before sunset. The Blue Hour occurs immediately following sunset (and before dawn) during civil twilight when the sun is between 0° and 6° below the horizon, creating vivid deep blue and indigo skylines across Hilo.

When does Solar Noon occur in Hilo?

Solar Noon in Hilo is the exact astronomical instant when the sun crosses the local meridian (-155.09° longitude) and reaches its maximum daily elevation. Depending on the time of year (the Equation of Time) and whether daylight saving time is active, Solar Noon generally falls between 11:45 AM and 1:30 PM in the Pacific/Honolulu zone.

How long does civil twilight last in Hilo?

In Hilo, civil twilight typically lasts between 25 and 45 minutes after sunset. Because the angle at which the sun sinks below the horizon depends on latitude (19.73°), twilight duration increases in the summer months and is longer than in equatorial regions.

How long is the daylight duration in Hilo across different seasons?

Located at latitude 19.73°, Hilo lies within the tropical zone. As a result, day length remains remarkably steady throughout the entire year, fluctuating by less than an hour between the summer and winter solstices (typically around 11.5 to 12.8 hours).

When are the Golden Hour and Blue Hour in Hilo?

The morning Golden Hour begins at sunrise and lasts for approximately 45–60 minutes, while the evening Golden Hour starts about an hour before sunset. The Blue Hour occurs immediately following sunset (and before dawn) during civil twilight when the sun is between 0° and 6° below the horizon, creating vivid deep blue and indigo skylines across Hilo.

When does Solar Noon occur in Hilo?

Solar Noon in Hilo is the exact astronomical instant when the sun crosses the local meridian (-155.09° longitude) and reaches its maximum daily elevation. Depending on the time of year (the Equation of Time) and whether daylight saving time is active, Solar Noon generally falls between 11:45 AM and 1:30 PM in the Pacific/Honolulu zone.

How long does civil twilight last in Hilo?

In Hilo, civil twilight typically lasts between 25 and 45 minutes after sunset. Because the angle at which the sun sinks below the horizon depends on latitude (19.73°), twilight duration increases in the summer months and is longer than in equatorial regions.

Hilo, United States Solar Ephemeris

Sunrise & Sunset in Hilo

Accurate daily dawn, dusk, civil twilight, solar noon, and day length schedule for Hilo. Coordinates: 19.7297° N, 155.0900° W (Pacific/Honolulu).

Current Time in Hilo Moon Phases in Hilo

Solar Ephemeris Calculation

Hilo, United States

Lat 19.73°, Lng -155.09° • Pacific/Honolulu

Sunrise06:07Upper limb crosses horizon

Sunset18:25Sun vanishes below horizon

Solar Noon12:16Sun at highest altitude

Total Daylight12h 18mBetween rise and set

Atmospheric Twilight Schedule in Hilo

Sun angles relative to horizon: Civil (0° to 6°), Nautical (6° to 12°), Astronomical (12° to 18°).

Civil Twilight

Dawn: 05:45Dusk: 18:47

Sufficient natural light for outdoor activities without artificial lighting.

Nautical Twilight

Dawn: 05:20Dusk: 19:12

Horizon visible at sea; bright navigational stars can be sighted.

Astronomical Twilight

Dawn: 04:54Dusk: 19:38

Threshold between twilight and complete optical night sky darkness.

Photographer Golden Hour WindowsMorning: 06:28 • Evening: 18:04

Optimal Soft Light

Geographical Solar Characteristics

Solar Profile & Seasonal Cycles in Hilo

Positioned at 19.7297° latitude and -155.0900° longitude, Hilo operates under the Pacific/Honolulu time standard. The local solar trajectory is determined by Earth's axial tilt relative to Hilo's geographic latitude:

Hemisphere & ZoneNorthern Hemisphere • Tropical Zone

Longest daylight occurs around June 21; shortest daylight occurs around December 21.

Atmospheric Refraction Lift+34 Arcminutes (~0.566°)

Atmospheric bending causes the sun to become visible approximately 2.5 to 3.5 minutes prior to true geometric sunrise in Hilo.

Solar Noon VarianceEquation of Time Drift

Depending on the time of year, true astronomical midday in Hilo deviates from clock midday by up to ±16 minutes due to orbital eccentricity.

Cinematography & Photography Protocol

Golden Hour & Blue Hour Photography Windows in Hilo

For landscape photographers, videographers, and creators in Hilo, the hour surrounding sunrise and sunset provides the most flattering, diffuse natural lighting:

Golden Hour (Warm Spectrum)Sun +6° to 0°

Light rays travel through extensive atmospheric air masses, scattering high-frequency blue photons and bathing Hilo's skyline and landscapes in warm amber, gold, and terracotta hues with long, soft shadows.

Blue Hour (Indigo & Cobalt)Sun 0° to -6°

Occurring during civil twilight, Chappuis ozone absorption filters longer red wavelengths, producing balanced cobalt twilight skies that contrast against the warm artificial architectural lighting of Hilo.

Frequently Asked Questions

Common queries, time calculations, and scientific explanations

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Today's exact sunrise and sunset times in Hilo (United States) are computed using high-precision NOAA solar ephemeris algorithms for coordinates 19.7297° latitude and -155.0900° longitude. The calculations account for atmospheric refraction (34 arcminutes) and local elevation.