Sunrise and sunset in Boulder

Boulder Sunrise, Sunset and Moon in January 2026

Local time (MST)

Day length goes from 8 h 42 min on January 1 to 9 h 40 min on January 31. Sunrise moves from 8:11 AM to 7:52 AM and sunset from 4:53 PM to 5:32 PM.

Every day

Dawn and dusk are civil twilight (the sun 6 degrees below the horizon); golden hour starts when the evening sun is 6 degrees up; full dark is astronomical twilight, 18 degrees down. A blank moonrise or moonset means it falls on the next day.

DateDawnSunriseSunsetDuskGolden hourFull darkDay lengthChangeMoonMoonriseMoonset
Jan 17:37 AM8:11 AM4:53 PM5:28 PM4:03 PM6:42 PM8 h 42 minWaxing gibbous, 95%2:44 PM6:49 AM
Jan 27:37 AM8:11 AM4:54 PM5:29 PM4:04 PM6:43 PM8 h 43 min+1.0 minWaxing gibbous, 99%3:52 PM7:59 AM
Jan 37:37 AM8:11 AM4:55 PM5:30 PM4:05 PM6:44 PM8 h 44 min+1.0 minFull moon 3:03 AM5:12 PM8:54 AM
Jan 47:37 AM8:11 AM4:56 PM5:31 PM4:06 PM6:45 PM8 h 45 min+1.0 minWaning gibbous, 99%6:36 PM9:34 AM
Jan 57:37 AM8:11 AM4:57 PM5:32 PM4:08 PM6:46 PM8 h 46 min+1.0 minWaning gibbous, 96%7:57 PM10:03 AM
Jan 67:37 AM8:11 AM4:58 PM5:33 PM4:09 PM6:47 PM8 h 47 min+1.0 minWaning gibbous, 90%9:14 PM10:26 AM
Jan 77:36 AM8:11 AM4:59 PM5:34 PM4:10 PM6:48 PM8 h 48 min+1.0 minWaning gibbous, 83%10:27 PM10:44 AM
Jan 87:36 AM8:10 AM5:01 PM5:35 PM4:11 PM6:49 PM8 h 51 min+3.0 minWaning gibbous, 75%11:36 PM11:00 AM
Jan 97:36 AM8:10 AM5:02 PM5:36 PM4:13 PM6:50 PM8 h 52 min+1.0 minWaning gibbous, 65%11:16 AM
Jan 107:36 AM8:10 AM5:03 PM5:37 PM4:14 PM6:51 PM8 h 53 min+1.0 minLast quarter 8:48 AM12:44 AM11:32 AM
Jan 117:35 AM8:09 AM5:04 PM5:38 PM4:15 PM6:52 PM8 h 55 min+2.0 minLast quarter, 44%1:51 AM11:50 AM
Jan 127:35 AM8:09 AM5:05 PM5:39 PM4:17 PM6:53 PM8 h 56 min+1.0 minWaning crescent, 34%2:58 AM12:11 PM
Jan 137:34 AM8:08 AM5:07 PM5:41 PM4:18 PM6:54 PM8 h 59 min+3.0 minWaning crescent, 24%4:06 AM12:38 PM
Jan 147:34 AM8:08 AM5:08 PM5:42 PM4:20 PM6:55 PM9 h 00 min+1.0 minWaning crescent, 16%5:12 AM1:12 PM
Jan 157:33 AM8:07 AM5:09 PM5:43 PM4:21 PM6:56 PM9 h 02 min+2.0 minWaning crescent, 9%6:13 AM1:56 PM
Jan 167:33 AM8:06 AM5:11 PM5:44 PM4:23 PM6:57 PM9 h 05 min+3.0 minWaning crescent, 4%7:07 AM2:50 PM
Jan 177:32 AM8:06 AM5:12 PM5:45 PM4:24 PM6:58 PM9 h 06 min+1.0 minNew moon, 1%7:51 AM3:54 PM
Jan 187:32 AM8:05 AM5:13 PM5:47 PM4:26 PM7:00 PM9 h 08 min+2.0 minNew moon 12:52 PM8:26 AM5:04 PM
Jan 197:31 AM8:04 AM5:15 PM5:48 PM4:27 PM7:01 PM9 h 11 min+3.0 minWaxing crescent, 2%8:54 AM6:16 PM
Jan 207:30 AM8:04 AM5:16 PM5:49 PM4:29 PM7:02 PM9 h 12 min+1.0 minWaxing crescent, 5%9:17 AM7:30 PM
Jan 217:30 AM8:03 AM5:18 PM5:51 PM4:31 PM7:03 PM9 h 15 min+3.0 minWaxing crescent, 11%9:36 AM8:43 PM
Jan 227:29 AM8:02 AM5:19 PM5:52 PM4:32 PM7:04 PM9 h 17 min+2.0 minWaxing crescent, 19%9:54 AM9:56 PM
Jan 237:28 AM8:01 AM5:20 PM5:53 PM4:34 PM7:05 PM9 h 19 min+2.0 minWaxing crescent, 27%10:10 AM11:10 PM
Jan 247:27 AM8:00 AM5:22 PM5:55 PM4:35 PM7:07 PM9 h 22 min+3.0 minWaxing crescent, 37%10:28 AM
Jan 257:26 AM7:59 AM5:23 PM5:56 PM4:37 PM7:08 PM9 h 24 min+2.0 minFirst quarter 9:48 PM10:48 AM12:27 AM
Jan 267:25 AM7:58 AM5:25 PM5:57 PM4:39 PM7:09 PM9 h 27 min+3.0 minFirst quarter, 58%11:13 AM1:46 AM
Jan 277:24 AM7:57 AM5:26 PM5:59 PM4:40 PM7:10 PM9 h 29 min+2.0 minWaxing gibbous, 69%11:46 AM3:08 AM
Jan 287:23 AM7:56 AM5:28 PM6:00 PM4:42 PM7:12 PM9 h 32 min+3.0 minWaxing gibbous, 78%12:31 PM4:29 AM
Jan 297:22 AM7:55 AM5:29 PM6:01 PM4:44 PM7:13 PM9 h 34 min+2.0 minWaxing gibbous, 86%1:31 PM5:42 AM
Jan 307:21 AM7:54 AM5:31 PM6:03 PM4:45 PM7:14 PM9 h 37 min+3.0 minWaxing gibbous, 93%2:44 PM6:42 AM
Jan 317:20 AM7:52 AM5:32 PM6:04 PM4:47 PM7:16 PM9 h 40 min+3.0 minWaxing gibbous, 97%4:06 PM7:27 AM

Other months

More

Sources

Computed with the NOAA solar position equations and the lunar methods of Meeus, Astronomical Algorithms, for a flat horizon; hills and buildings delay a real sunrise.