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Boulder, Colorado, USA — Sunrise, Sunset, and Daylength, December 2021

Daylight

7:04 am – 4:36 pm
9 hours, 32 minutes

Current Time: Dec 1, 2021 at 9:49:14 am
Sun Direction: 150° Southeast
Sun Altitude: 22.0°
Sun Distance: 91.659 million mi
Next Solstice: Dec 21, 2021 8:59 am (Winter)
Sunrise Today: 7:04 am 118° Southeast
Sunset Today: 4:36 pm 242° Southwest
Location of BoulderLocation

2021 Sun Graph for Boulder

December 2021 — Sun in Boulder

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2021Sunrise/SunsetDaylengthAstronomical TwilightNautical TwilightCivil TwilightSolar Noon
DecSunriseSunsetLengthDiff.StartEndStartEndStartEndTimeMil. mi
17:04 am (118°)4:36 pm (242°)9:32:09−1:145:27 am6:12 pm6:00 am5:39 pm6:34 am5:06 pm11:50 am (28.1°)91.658
27:05 am (119°)4:36 pm (241°)9:30:57−1:115:28 am6:12 pm6:01 am5:39 pm6:34 am5:06 pm11:50 am (27.9°)91.644
37:06 am (119°)4:35 pm (241°)9:29:49−1:085:29 am6:12 pm6:02 am5:39 pm6:35 am5:05 pm11:51 am (27.8°)91.629
47:06 am (119°)4:35 pm (241°)9:28:44−1:055:30 am6:12 pm6:03 am5:39 pm6:36 am5:05 pm11:51 am (27.7°)91.616
57:07 am (119°)4:35 pm (241°)9:27:42−1:015:31 am6:12 pm6:03 am5:39 pm6:37 am5:05 pm11:51 am (27.6°)91.602
67:08 am (119°)4:35 pm (241°)9:26:44−0:585:31 am6:12 pm6:04 am5:39 pm6:38 am5:05 pm11:52 am (27.4°)91.589
77:09 am (119°)4:35 pm (241°)9:25:49−0:545:32 am6:12 pm6:05 am5:39 pm6:39 am5:05 pm11:52 am (27.3°)91.576
87:10 am (120°)4:35 pm (240°)9:24:58−0:515:33 am6:12 pm6:06 am5:39 pm6:40 am5:05 pm11:53 am (27.2°)91.563
97:11 am (120°)4:35 pm (240°)9:24:10−0:475:34 am6:12 pm6:07 am5:39 pm6:41 am5:06 pm11:53 am (27.1°)91.551
107:12 am (120°)4:35 pm (240°)9:23:27−0:435:35 am6:12 pm6:07 am5:40 pm6:41 am5:06 pm11:54 am (27.0°)91.539
117:13 am (120°)4:35 pm (240°)9:22:46−0:405:35 am6:13 pm6:08 am5:40 pm6:42 am5:06 pm11:54 am (27.0°)91.528
127:13 am (120°)4:36 pm (240°)9:22:10−0:365:36 am6:13 pm6:09 am5:40 pm6:43 am5:06 pm11:54 am (26.9°)91.517
137:14 am (120°)4:36 pm (240°)9:21:37−0:325:37 am6:13 pm6:10 am5:40 pm6:44 am5:06 pm11:55 am (26.8°)91.506
147:15 am (120°)4:36 pm (240°)9:21:09−0:285:37 am6:14 pm6:10 am5:41 pm6:44 am5:06 pm11:55 am (26.8°)91.496
157:16 am (120°)4:36 pm (240°)9:20:44−0:245:38 am6:14 pm6:11 am5:41 pm6:45 am5:07 pm11:56 am (26.7°)91.487
167:16 am (120°)4:37 pm (240°)9:20:23−0:215:39 am6:14 pm6:12 am5:41 pm6:46 am5:07 pm11:56 am (26.7°)91.478
177:17 am (120°)4:37 pm (240°)9:20:06−0:175:39 am6:15 pm6:12 am5:42 pm6:46 am5:07 pm11:57 am (26.6°)91.470
187:17 am (120°)4:37 pm (240°)9:19:52−0:135:40 am6:15 pm6:13 am5:42 pm6:47 am5:08 pm11:57 am (26.6°)91.462
197:18 am (120°)4:38 pm (240°)9:19:43−0:095:40 am6:15 pm6:13 am5:42 pm6:47 am5:08 pm11:58 am (26.6°)91.455
207:19 am (120°)4:38 pm (240°)9:19:37−0:055:41 am6:16 pm6:14 am5:43 pm6:48 am5:09 pm11:58 am (26.6°)91.448
217:19 am (120°)4:39 pm (240°)9:19:36−0:015:41 am6:16 pm6:14 am5:43 pm6:48 am5:09 pm11:59 am (26.6°)91.442
227:20 am (120°)4:39 pm (240°)9:19:39+0:025:42 am6:17 pm6:15 am5:44 pm6:49 am5:10 pm11:59 am (26.6°)91.436
237:20 am (120°)4:40 pm (240°)9:19:45+0:065:42 am6:17 pm6:15 am5:44 pm6:49 am5:10 pm12:00 pm (26.6°)91.431
247:20 am (120°)4:40 pm (240°)9:19:55+0:105:43 am6:18 pm6:16 am5:45 pm6:50 am5:11 pm12:00 pm (26.6°)91.427
257:21 am (120°)4:41 pm (240°)9:20:10+0:145:43 am6:19 pm6:16 am5:46 pm6:50 am5:12 pm12:01 pm (26.6°)91.423
267:21 am (120°)4:42 pm (240°)9:20:28+0:185:44 am6:19 pm6:17 am5:46 pm6:51 am5:12 pm12:01 pm (26.7°)91.419
277:21 am (120°)4:42 pm (240°)9:20:50+0:225:44 am6:20 pm6:17 am5:47 pm6:51 am5:13 pm12:02 pm (26.7°)91.416
287:22 am (120°)4:43 pm (240°)9:21:16+0:265:44 am6:21 pm6:17 am5:48 pm6:51 am5:14 pm12:02 pm (26.8°)91.414
297:22 am (120°)4:44 pm (240°)9:21:46+0:295:45 am6:21 pm6:17 am5:48 pm6:52 am5:14 pm12:03 pm (26.8°)91.412
307:22 am (120°)4:45 pm (240°)9:22:20+0:335:45 am6:22 pm6:18 am5:49 pm6:52 am5:15 pm12:03 pm (26.9°)91.410
317:22 am (120°)4:45 pm (240°)9:22:57+0:375:45 am6:23 pm6:18 am5:50 pm6:52 am5:16 pm12:04 pm (27.0°)91.409
* All times are local time for Boulder. They take into account refraction. Dates are based on the Gregorian calendar. Today is highlighted.

December Solstice (Winter Solstice) is on Tuesday, December 21, 2021 at 8:59 am in Boulder. In terms of daylight, this day is 5 hours, 41 minutes shorter than on June Solstice. In most locations north of Equator, the shortest day of the year is around this date.

Earliest sunset is on December 7.

Why is the earliest sunset not on Winter Solstice?

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