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Flag for USA Boulder, CO, USA — Sunrise, Sunset, and Moon Times for Today

Moon: 36.9%

Waxing Crescent

Current Time: Feb 21, 2018 at 8:19:03 pm


Sunrise Today: 6:45 am 103° East
Sunset Today: 5:44 pm 257° West


Moonrise Today: 10:05 am 76° East
Moonset Today: 11:51 pm 287° West


Daylight Hours: 10 hours, 58 minutes (+2m 31s)

Location of BoulderLocation

Today's Sun Position in Boulder

The Sun's altitude in Boulder today. The horizontal line signifies the horizon, the vertical lines show the times of sunrise and sunset. Altitude and heading are displayed in a separate box. The graph defaults to current time. Hover over it to select a different time. How to use this

Sun's current position over Earth

8:19 pm

Altitude

-30.2°

Heading

283° W

Position

Night

Day length

10h 58m 13s

Change since

Yesterday: +2m 31s

Winter: +1h 38m

Summer: -4h 2m

Night, Twilight, and Daylight Times in Boulder Today

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Day, night, and twilight times in Boulder today. Black is nighttime, light blue is daytime. The darker blue shadings represent the twilight phases during dawn (left) and dusk (right). Hover over the graph for more information. How to use this

Night12:00 am – 5:15 am
Astro. Twilight5:15 am – 5:46 am
Nautical Twilight5:46 am – 6:18 am
Civil Twilight6:18 am – 6:45 am
Daylight6:45 am – 5:44 pm
Civil Twilight5:44 pm – 6:11 pm
Nautical Twilight6:11 pm – 6:43 pm
Astro. Twilight6:43 pm – 7:14 pm
Night7:14 pm – 11:59 pm

Sun in Boulder - Next 7 Days

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2018Sunrise/SunsetDaylengthSolar Noon
FebSunriseSunsetLengthDifferenceTimeMil. mi
Feb 216:45 am5:44 pm10:58:14+2:3212:14 pm (39.6°)91.943
Feb 226:44 am5:45 pm11:00:46+2:3212:14 pm (40.0°)91.963
Feb 236:43 am5:46 pm11:03:19+2:3312:14 pm (40.4°)91.984
Feb 246:41 am5:47 pm11:05:52+2:3312:14 pm (40.7°)92.004
Feb 256:40 am5:48 pm11:08:25+2:3312:14 pm (41.1°)92.025
Feb 266:38 am5:49 pm11:10:59+2:3412:13 pm (41.5°)92.046
Feb 276:37 am5:50 pm11:13:34+2:3512:13 pm (41.9°)92.068
* All times are local time for Boulder. They take into account refraction. Dates are based on the Gregorian calendar.

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Equinoxes & Solstices 2018

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2018DateTime
March EquinoxMar 2010:15 am
June SolsticeJun 214:07 am
September EquinoxSep 227:54 pm
December SolsticeDec 213:23 pm
* All times are local Boulder time.

Sun Articles

Today's Moon in Boulder

The Moon's path in Boulder today. The horizontal line signifies the horizon, the vertical lines show times and headings of moonrise and moonset. The graph defaults to current time. Hover over it to select a different time. How to use this

Year 2018 Moon Phases

8:19 pm

Altitude

37.8°

Heading

252° W

Position

Waxing Crescent

Percent illuminated

36.9%

Moon in Boulder - Next 7 days

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2018Moonrise/MoonsetMeridian Passing
FebMoonriseMoonsetMoonriseTimeDistance (mi)Illumination
Feb 2110:05 am11:51 pm-4:54 pm(61.1°)234,85635.4%
Feb 2210:43 am--5:46 pm(64.8°)232,52946.7%
Feb 23-12:58 am11:25 am6:42 pm(67.7°)230,32658.4%
Feb 24-2:04 am12:15 pm7:40 pm(69.3°)228,40669.8%
Feb 25-3:08 am1:11 pm8:40 pm(69.6°)226,96580.3%
Feb 26-4:07 am2:15 pm9:40 pm(68.5°)226,20889.1%
Feb 27-5:01 am3:23 pm10:39 pm(65.9°)226,30495.6%
* All times are local time for Boulder. They take into account refraction. Dates are based on the Gregorian calendar. Illumination is calculated at lunar noon.

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Moon Articles

Planets Visible in the Sky in Boulder This Coming Night

 Planetrise/Planetset, Wed, Feb 21, 2018
PlanetRiseSetMeridianComment
MercuryThu 7:04 amThu 6:04 pmThu 12:33 pmVery difficult to see
VenusThu 7:18 amThu 6:35 pmThu 12:56 pmSlightly difficult to see
MarsThu 2:10 amThu 11:34 amThu 6:52 amAverage visiblity
JupiterThu 12:13 amThu 10:16 amThu 5:14 amPerfect visibility
SaturnThu 3:38 amThu 1:02 pmThu 8:20 amAverage visiblity
UranusWed 8:55 amWed 10:03 pmWed 3:29 pmDifficult to see
NeptuneThu 7:13 amThu 6:28 pmThu 12:51 pmExtremely difficult to see
* All times are local time for Boulder.

More about the planets visible in the night sky in Boulder