Sunrise and sunset times in Boulder, CO
Check out today's and tomorrow's sunrise and sunset times in Boulder, CO, United States, as well as the whole calendar for April 2025.
Today
April 24, 2025 . Current time: 11:36:39 am
First light at 5:40:34 am
Sunrise time: 6:07:54 am
Sunset time: 7:50:21 pm
Last light at 8:17:41 pm
Day length: 13 hours, 42 minutes
8 hours, 13 minutes left for today's sunset in Boulder
Moon rose on Apr 24 at 03:25 AM
Moon will set on Apr 24 at 03:20 PMMoon phase: 🌘 Waning Crescent (14%)Tomorrow
April 25, 2025
First light at 5:39:08 am
Sunrise time: 6:06:32 am
Sunset time: 7:51:22 pm
Last light at 8:18:47 pm
Day length: 13 hours, 44 minutes
Tomorrow will be approximately 2 minutes longer than today in Boulder
Moon will rise on Apr 25 at 03:50 AM Moon will set on Apr 25 at 04:35 PMMoon phase: 🌘 Waning Crescent (4%)
- Boulder, Colorado
- Latitude: 40.014984
- Longitude: -105.270546
- Time zone: Mountain Time MDT
Shortest day in Boulder, CO
The shortest day of the year will be in 8 months, during the winter solstice on December 21, 2025, with a daylight length of 9 hours and 22 minutes.Longest day in Boulder, CO
The longest day of the year will be in 1 month and 26 days, during the summer solstice on June 20, 2025, with a daylight length of 15 hours and 4 minutes.
April 2025 - Boulder, Colorado - Sunrise and sunset calendar
Sunrise and sunset times, civil twilight start and end times as well as solar noon, and day length for every day of April in Boulder.
The day length increases by 1 hour, 12 minutes over the course of April 2025 in Boulder, CO - from 12 hours, 44 minutes on the first day to 13 hours, 56 minutes on the last day.
| Day | Twilight Start | Sunrise | Sunset | Twilight End | Day Length | Day Length Variation | Solar Noon
Time of day when the sun reaches its highest point in the sky.
|
Max Sun Altitude | Nautical Twilight Start | Nautical Twilight End | Astronomical Twilight Start | Astronomical Twilight End | Night Length
Calculated form this day's sunset to the next day's sunrise.
|
Moon phase |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tue, Apr 1 | 6:16:39 am | 6:42:36 am | 7:26:57 pm | 7:52:53 pm | 12h 44m 21s | 12h 44m 21s | 1:04:46 pm | 44.9° | 5:44:19 am | 8:25:14 pm | 5:10:59 am | 8:58:34 pm | 11h 14m 3s | 🌒 (11%) |
| Wed, Apr 2 | 6:15:01 am | 6:41:00 am | 7:27:58 pm | 7:53:57 pm | 12h 46m 58s | 2m 37s | 1:04:29 pm | 45.3° | 5:42:36 am | 8:26:21 pm | 5:09:09 am | 8:59:49 pm | 11h 11m 26s | 🌒 (20%) |
| Thu, Apr 3 | 6:13:22 am | 6:39:24 am | 7:28:58 pm | 7:55:00 pm | 12h 49m 34s | 2m 36s | 1:04:11 pm | 45.6° | 5:40:53 am | 8:27:30 pm | 5:07:18 am | 9:01:04 pm | 11h 8m 50s | 🌒 (30%) |
| Fri, Apr 4 | 6:11:44 am | 6:37:48 am | 7:29:59 pm | 7:56:03 pm | 12h 52m 11s | 2m 37s | 1:03:54 pm | 46° | 5:39:10 am | 8:28:38 pm | 5:05:27 am | 9:02:20 pm | 11h 6m 14s | 🌒 (41%) |
| Sat, Apr 5 | 6:10:06 am | 6:36:13 am | 7:31:00 pm | 7:57:07 pm | 12h 54m 47s | 2m 36s | 1:03:37 pm | 46.4° | 5:37:27 am | 8:29:47 pm | 5:03:36 am | 9:03:37 pm | 11h 3m 38s | 🌓 (52%) |
| Sun, Apr 6 | 6:08:29 am | 6:34:38 am | 7:32:01 pm | 7:58:11 pm | 12h 57m 23s | 2m 36s | 1:03:20 pm | 46.8° | 5:35:44 am | 8:30:56 pm | 5:01:45 am | 9:04:54 pm | 11h 1m 3s | 🌔 (62%) |
| Mon, Apr 7 | 6:06:51 am | 6:33:04 am | 7:33:02 pm | 7:59:15 pm | 12h 59m 58s | 2m 35s | 1:03:03 pm | 47.2° | 5:34:01 am | 8:32:05 pm | 4:59:54 am | 9:06:12 pm | 10h 58m 28s | 🌔 (72%) |
| Tue, Apr 8 | 6:05:14 am | 6:31:30 am | 7:34:03 pm | 8:00:19 pm | 13h 2m 33s | 2m 35s | 1:02:46 pm | 47.5° | 5:32:18 am | 8:33:15 pm | 4:58:03 am | 9:07:30 pm | 10h 55m 54s | 🌔 (80%) |
| Wed, Apr 9 | 6:03:38 am | 6:29:57 am | 7:35:04 pm | 8:01:23 pm | 13h 5m 7s | 2m 34s | 1:02:30 pm | 47.9° | 5:30:36 am | 8:34:25 pm | 4:56:12 am | 9:08:49 pm | 10h 53m 20s | 🌔 (87%) |
| Thu, Apr 10 | 6:02:01 am | 6:28:24 am | 7:36:05 pm | 8:02:27 pm | 13h 7m 41s | 2m 34s | 1:02:14 pm | 48.3° | 5:28:54 am | 8:35:35 pm | 4:54:21 am | 9:10:08 pm | 10h 50m 46s | 🌔 (93%) |
| Fri, Apr 11 | 6:00:25 am | 6:26:51 am | 7:37:06 pm | 8:03:32 pm | 13h 10m 15s | 2m 34s | 1:01:59 pm | 48.6° | 5:27:12 am | 8:36:46 pm | 4:52:29 am | 9:11:28 pm | 10h 48m 13s | 🌔 (97%) |
| Sat, Apr 12 | 5:58:50 am | 6:25:19 am | 7:38:07 pm | 8:04:36 pm | 13h 12m 48s | 2m 33s | 1:01:43 pm | 49° | 5:25:30 am | 8:37:56 pm | 4:50:38 am | 9:12:48 pm | 10h 45m 41s | 🌔 (99%) |
| Sun, Apr 13 | 5:57:15 am | 6:23:48 am | 7:39:08 pm | 8:05:41 pm | 13h 15m 20s | 2m 32s | 1:01:28 pm | 49.4° | 5:23:49 am | 8:39:08 pm | 4:48:47 am | 9:14:09 pm | 10h 43m 10s | 🌕 (100%) |
| Mon, Apr 14 | 5:55:41 am | 6:22:18 am | 7:40:09 pm | 8:06:46 pm | 13h 17m 51s | 2m 31s | 1:01:13 pm | 49.7° | 5:22:08 am | 8:40:19 pm | 4:46:56 am | 9:15:30 pm | 10h 40m 39s | 🌖 (99%) |
| Tue, Apr 15 | 5:54:07 am | 6:20:48 am | 7:41:10 pm | 8:07:51 pm | 13h 20m 22s | 2m 31s | 1:00:59 pm | 50.1° | 5:20:27 am | 8:41:31 pm | 4:45:05 am | 9:16:52 pm | 10h 38m 9s | 🌖 (96%) |
| Wed, Apr 16 | 5:52:34 am | 6:19:19 am | 7:42:11 pm | 8:08:56 pm | 13h 22m 52s | 2m 30s | 1:00:45 pm | 50.4° | 5:18:47 am | 8:42:43 pm | 4:43:15 am | 9:18:15 pm | 10h 35m 39s | 🌖 (91%) |
| Thu, Apr 17 | 5:51:01 am | 6:17:50 am | 7:43:12 pm | 8:10:01 pm | 13h 25m 22s | 2m 30s | 1:00:31 pm | 50.8° | 5:17:07 am | 8:43:55 pm | 4:41:24 am | 9:19:38 pm | 10h 33m 10s | 🌖 (85%) |
| Fri, Apr 18 | 5:49:29 am | 6:16:22 am | 7:44:13 pm | 8:11:06 pm | 13h 27m 51s | 2m 29s | 1:00:18 pm | 51.1° | 5:15:28 am | 8:45:08 pm | 4:39:34 am | 9:21:01 pm | 10h 30m 42s | 🌖 (77%) |
| Sat, Apr 19 | 5:47:58 am | 6:14:55 am | 7:45:15 pm | 8:12:12 pm | 13h 30m 20s | 2m 29s | 1:00:05 pm | 51.5° | 5:13:49 am | 8:46:21 pm | 4:37:44 am | 9:22:26 pm | 10h 28m 14s | 🌖 (68%) |
| Sun, Apr 20 | 5:46:28 am | 6:13:29 am | 7:46:16 pm | 8:13:17 pm | 13h 32m 47s | 2m 27s | 12:59:53 pm | 51.8° | 5:12:11 am | 8:47:34 pm | 4:35:55 am | 9:23:50 pm | 10h 25m 48s | 🌖 (58%) |
| Mon, Apr 21 | 5:44:58 am | 6:12:04 am | 7:47:17 pm | 8:14:23 pm | 13h 35m 13s | 2m 26s | 12:59:41 pm | 52.2° | 5:10:34 am | 8:48:47 pm | 4:34:06 am | 9:25:15 pm | 10h 23m 23s | 🌗 (48%) |
| Tue, Apr 22 | 5:43:29 am | 6:10:40 am | 7:48:18 pm | 8:15:29 pm | 13h 37m 38s | 2m 25s | 12:59:29 pm | 52.5° | 5:08:57 am | 8:50:01 pm | 4:32:17 am | 9:26:41 pm | 10h 20m 58s | 🌘 (38%) |
| Wed, Apr 23 | 5:42:01 am | 6:09:16 am | 7:49:20 pm | 8:16:35 pm | 13h 40m 4s | 2m 26s | 12:59:18 pm | 52.8° | 5:07:21 am | 8:51:15 pm | 4:30:29 am | 9:28:07 pm | 10h 18m 34s | 🌘 (27%) |
| Thu, Apr 24 | 5:40:34 am | 6:07:54 am | 7:50:21 pm | 8:17:41 pm | 13h 42m 27s | 2m 23s | 12:59:07 pm | 53.2° | 5:05:46 am | 8:52:29 pm | 4:28:41 am | 9:29:34 pm | 10h 16m 11s | 🌘 (18%) |
| Fri, Apr 25 | 5:39:08 am | 6:06:32 am | 7:51:22 pm | 8:18:47 pm | 13h 44m 50s | 2m 23s | 12:58:57 pm | 53.5° | 5:04:11 am | 8:53:43 pm | 4:26:54 am | 9:31:00 pm | 10h 13m 50s | 🌘 (10%) |
| Sat, Apr 26 | 5:37:42 am | 6:05:12 am | 7:52:23 pm | 8:19:53 pm | 13h 47m 11s | 2m 21s | 12:58:48 pm | 53.8° | 5:02:37 am | 8:54:58 pm | 4:25:07 am | 9:32:28 pm | 10h 11m 30s | 🌘 (4%) |
| Sun, Apr 27 | 5:36:18 am | 6:03:53 am | 7:53:24 pm | 8:20:59 pm | 13h 49m 31s | 2m 20s | 12:58:38 pm | 54.1° | 5:01:04 am | 8:56:12 pm | 4:23:21 am | 9:33:56 pm | 10h 9m 10s | 🌘 (0%) |
| Mon, Apr 28 | 5:34:55 am | 6:02:34 am | 7:54:25 pm | 8:22:05 pm | 13h 51m 51s | 2m 20s | 12:58:30 pm | 54.4° | 4:59:32 am | 8:57:27 pm | 4:21:36 am | 9:35:24 pm | 10h 6m 52s | 🌑 (0%) |
| Tue, Apr 29 | 5:33:32 am | 6:01:17 am | 7:55:26 pm | 8:23:11 pm | 13h 54m 9s | 2m 18s | 12:58:22 pm | 54.7° | 4:58:01 am | 8:58:42 pm | 4:19:51 am | 9:36:52 pm | 10h 4m 35s | 🌒 (3%) |
| Wed, Apr 30 | 5:32:11 am | 6:00:01 am | 7:56:27 pm | 8:24:17 pm | 13h 56m 26s | 2m 17s | 12:58:14 pm | 55° | 4:56:31 am | 8:59:57 pm | 4:18:07 am | 9:38:21 pm | 10h 2m 19s | 🌒 (9%) |
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Sunrise and Sunset photos in Boulder, CO
Enjoy this beautiful gallery of images of the sunset and sunrise at Boulder, CO. All images provided by our fantastic community of photographers!
Year distribution of sunrise and sunset times in Boulder, CO - 2025
The followin graph shows sunrise and sunset times in Boulder, CO for every day of the year. There are two jumps in the graph that represent the hour change for Daylight Saving Time (DST) in Boulder, CO.