Sunrise and sunset in Boulder

Boulder Sunrise, Sunset and Moon in April 2026

Local time (MDT)

Day length goes from 12 h 49 min on April 1 to 14 h 20 min on April 30. Sunrise moves from 7:08 AM to 6:16 AM and sunset from 7:57 PM to 8:36 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
Apr 16:38 AM7:08 AM7:57 PM8:28 PM7:18 PM9:42 PM12 h 49 minFull moon 8:12 PM7:59 PM6:46 AM
Apr 26:36 AM7:06 AM7:59 PM8:29 PM7:19 PM9:44 PM12 h 53 min+4.0 minFull moon, 100%9:09 PM7:03 AM
Apr 36:34 AM7:04 AM8:00 PM8:31 PM7:20 PM9:46 PM12 h 56 min+3.0 minWaning gibbous, 98%10:18 PM7:21 AM
Apr 46:32 AM7:02 AM8:01 PM8:32 PM7:22 PM9:47 PM12 h 59 min+3.0 minWaning gibbous, 94%11:27 PM7:42 AM
Apr 56:30 AM7:00 AM8:03 PM8:34 PM7:23 PM9:49 PM13 h 03 min+4.0 minWaning gibbous, 88%8:08 AM
Apr 66:28 AM6:58 AM8:04 PM8:35 PM7:24 PM9:51 PM13 h 06 min+3.0 minWaning gibbous, 80%12:34 AM8:40 AM
Apr 76:26 AM6:56 AM8:05 PM8:36 PM7:26 PM9:53 PM13 h 09 min+3.0 minWaning gibbous, 71%1:37 AM9:22 AM
Apr 86:24 AM6:55 AM8:07 PM8:38 PM7:27 PM9:55 PM13 h 12 min+3.0 minWaning gibbous, 61%2:32 AM10:13 AM
Apr 96:22 AM6:53 AM8:08 PM8:39 PM7:28 PM9:56 PM13 h 15 min+3.0 minLast quarter 10:52 PM3:17 AM11:13 AM
Apr 106:20 AM6:51 AM8:09 PM8:41 PM7:29 PM9:58 PM13 h 18 min+3.0 minWaning crescent, 40%3:54 AM12:20 PM
Apr 116:18 AM6:49 AM8:11 PM8:42 PM7:31 PM10:00 PM13 h 22 min+4.0 minWaning crescent, 30%4:23 AM1:31 PM
Apr 126:16 AM6:47 AM8:12 PM8:43 PM7:32 PM10:02 PM13 h 25 min+3.0 minWaning crescent, 21%4:46 AM2:43 PM
Apr 136:14 AM6:45 AM8:13 PM8:45 PM7:33 PM10:04 PM13 h 28 min+3.0 minWaning crescent, 13%5:06 AM3:57 PM
Apr 146:12 AM6:43 AM8:15 PM8:46 PM7:34 PM10:06 PM13 h 32 min+4.0 minWaning crescent, 7%5:24 AM5:12 PM
Apr 156:10 AM6:42 AM8:16 PM8:48 PM7:36 PM10:08 PM13 h 34 min+2.0 minWaning crescent, 2%5:42 AM6:30 PM
Apr 166:08 AM6:40 AM8:18 PM8:49 PM7:37 PM10:09 PM13 h 38 min+4.0 minNew moon, 0%6:01 AM7:50 PM
Apr 176:06 AM6:38 AM8:19 PM8:51 PM7:38 PM10:11 PM13 h 41 min+3.0 minNew moon 5:53 AM6:22 AM9:15 PM
Apr 186:04 AM6:36 AM8:20 PM8:52 PM7:39 PM10:13 PM13 h 44 min+3.0 minWaxing crescent, 3%6:49 AM10:41 PM
Apr 196:03 AM6:34 AM8:22 PM8:53 PM7:41 PM10:15 PM13 h 48 min+4.0 minWaxing crescent, 7%7:23 AM
Apr 206:01 AM6:33 AM8:23 PM8:55 PM7:42 PM10:17 PM13 h 50 min+2.0 minWaxing crescent, 14%8:10 AM12:05 AM
Apr 215:59 AM6:31 AM8:24 PM8:56 PM7:43 PM10:19 PM13 h 53 min+3.0 minWaxing crescent, 22%9:10 AM1:20 AM
Apr 225:57 AM6:29 AM8:25 PM8:58 PM7:44 PM10:21 PM13 h 56 min+3.0 minWaxing crescent, 31%10:22 AM2:19 AM
Apr 235:55 AM6:28 AM8:27 PM8:59 PM7:46 PM10:23 PM13 h 59 min+3.0 minFirst quarter 8:32 PM11:41 AM3:03 AM
Apr 245:53 AM6:26 AM8:28 PM9:01 PM7:47 PM10:25 PM14 h 02 min+3.0 minFirst quarter, 52%1:00 PM3:36 AM
Apr 255:52 AM6:24 AM8:29 PM9:02 PM7:48 PM10:27 PM14 h 05 min+3.0 minWaxing gibbous, 62%2:17 PM4:00 AM
Apr 265:50 AM6:23 AM8:31 PM9:04 PM7:49 PM10:29 PM14 h 08 min+3.0 minWaxing gibbous, 72%3:30 PM4:20 AM
Apr 275:48 AM6:21 AM8:32 PM9:05 PM7:51 PM10:32 PM14 h 11 min+3.0 minWaxing gibbous, 81%4:40 PM4:37 AM
Apr 285:46 AM6:19 AM8:33 PM9:06 PM7:52 PM10:34 PM14 h 14 min+3.0 minWaxing gibbous, 89%5:48 PM4:53 AM
Apr 295:45 AM6:18 AM8:35 PM9:08 PM7:53 PM10:36 PM14 h 17 min+3.0 minWaxing gibbous, 95%6:57 PM5:09 AM
Apr 305:43 AM6:16 AM8:36 PM9:09 PM7:54 PM10:38 PM14 h 20 min+3.0 minWaxing gibbous, 98%8:05 PM5:26 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.