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 May 2026.
Today
May 9, 2026 . Current time: 11:02:04 am
First light at 5:21:11 am
Sunrise time: 5:49:48 am
Sunset time: 8:05:14 pm
Last light at 8:33:51 pm
Day length: 14 hours, 15 minutes
9 hours, 3 minutes left for today's sunset in Boulder
Moon rose on May 9 at 01:03 AM
Moon will set on May 9 at 11:13 AMMoon phase: 🌗 Last Quarter (52%)Tomorrow
May 10, 2026
First light at 5:20:02 am
Sunrise time: 5:48:45 am
Sunset time: 8:06:13 pm
Last light at 8:34:56 pm
Day length: 14 hours, 17 minutes
Tomorrow will be approximately 2 minutes longer than today in Boulder
Moon will rise on May 10 at 01:29 AM Moon will set on May 10 at 12:18 PMMoon phase: 🌘 Waning Crescent (36%)
- 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, 2026, 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 10 days, during the summer solstice on June 20, 2026, with a daylight length of 15 hours and 4 minutes.
May 2026 - 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 May in Boulder.
The day length increases by 53 minutes over the course of May 2026 in Boulder, CO - from 13 hours, 58 minutes on the first day to 14 hours, 51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fri, May 1 | 5:31:10 am | 5:59:04 am | 7:57:13 pm | 8:25:07 pm | 13h 58m 9s | 13h 58m 9s | 12:58:09 pm | 55.3° | 4:55:23 am | 9:00:54 pm | 4:16:49 am | 9:39:28 pm | 10h 0m 37s | 🌕 (100%) |
| Sat, May 2 | 5:29:51 am | 5:57:50 am | 7:58:14 pm | 8:26:13 pm | 14h 0m 24s | 2m 15s | 12:58:02 pm | 55.6° | 4:53:55 am | 9:02:09 pm | 4:15:07 am | 9:40:57 pm | 9h 58m 23s | 🌖 (100%) |
| Sun, May 3 | 5:28:33 am | 5:56:37 am | 7:59:14 pm | 8:27:19 pm | 14h 2m 37s | 2m 13s | 12:57:56 pm | 55.9° | 4:52:28 am | 9:03:24 pm | 4:13:25 am | 9:42:27 pm | 9h 56m 12s | 🌖 (98%) |
| Mon, May 4 | 5:27:16 am | 5:55:26 am | 8:00:15 pm | 8:28:25 pm | 14h 4m 49s | 2m 12s | 12:57:50 pm | 56.2° | 4:51:02 am | 9:04:39 pm | 4:11:44 am | 9:43:56 pm | 9h 54m 1s | 🌖 (94%) |
| Tue, May 5 | 5:26:00 am | 5:54:16 am | 8:01:15 pm | 8:29:30 pm | 14h 6m 59s | 2m 10s | 12:57:45 pm | 56.4° | 4:49:37 am | 9:05:54 pm | 4:10:05 am | 9:45:26 pm | 9h 51m 52s | 🌖 (89%) |
| Wed, May 6 | 5:24:46 am | 5:53:07 am | 8:02:15 pm | 8:30:36 pm | 14h 9m 8s | 2m 9s | 12:57:41 pm | 56.7° | 4:48:13 am | 9:07:09 pm | 4:08:26 am | 9:46:56 pm | 9h 49m 44s | 🌖 (82%) |
| Thu, May 7 | 5:23:33 am | 5:51:59 am | 8:03:15 pm | 8:31:41 pm | 14h 11m 16s | 2m 8s | 12:57:37 pm | 57° | 4:46:50 am | 9:08:24 pm | 4:06:49 am | 9:48:26 pm | 9h 47m 38s | 🌖 (75%) |
| Fri, May 8 | 5:22:21 am | 5:50:53 am | 8:04:15 pm | 8:32:46 pm | 14h 13m 22s | 2m 6s | 12:57:34 pm | 57.3° | 4:45:29 am | 9:09:38 pm | 4:05:12 am | 9:49:55 pm | 9h 45m 33s | 🌖 (66%) |
| Sat, May 9 | 5:21:11 am | 5:49:48 am | 8:05:14 pm | 8:33:51 pm | 14h 15m 26s | 2m 4s | 12:57:31 pm | 57.5° | 4:44:09 am | 9:10:53 pm | 4:03:37 am | 9:51:25 pm | 9h 43m 31s | 🌖 (56%) |
| Sun, May 10 | 5:20:02 am | 5:48:45 am | 8:06:13 pm | 8:34:56 pm | 14h 17m 28s | 2m 2s | 12:57:29 pm | 57.8° | 4:42:51 am | 9:12:07 pm | 4:02:03 am | 9:52:55 pm | 9h 41m 30s | 🌗 (46%) |
| Mon, May 11 | 5:18:55 am | 5:47:43 am | 8:07:11 pm | 8:36:00 pm | 14h 19m 28s | 2m 0s | 12:57:27 pm | 58° | 4:41:34 am | 9:13:21 pm | 4:00:30 am | 9:54:24 pm | 9h 39m 32s | 🌘 (36%) |
| Tue, May 12 | 5:17:49 am | 5:46:43 am | 8:08:10 pm | 8:37:04 pm | 14h 21m 27s | 1m 59s | 12:57:26 pm | 58.3° | 4:40:18 am | 9:14:34 pm | 3:58:59 am | 9:55:54 pm | 9h 37m 34s | 🌘 (26%) |
| Wed, May 13 | 5:16:45 am | 5:45:44 am | 8:09:08 pm | 8:38:07 pm | 14h 23m 24s | 1m 57s | 12:57:26 pm | 58.5° | 4:39:04 am | 9:15:47 pm | 3:57:29 am | 9:57:22 pm | 9h 35m 39s | 🌘 (17%) |
| Thu, May 14 | 5:15:42 am | 5:44:47 am | 8:10:05 pm | 8:39:10 pm | 14h 25m 18s | 1m 54s | 12:57:26 pm | 58.8° | 4:37:52 am | 9:17:00 pm | 3:56:01 am | 9:58:51 pm | 9h 33m 46s | 🌘 (9%) |
| Fri, May 15 | 5:14:41 am | 5:43:51 am | 8:11:02 pm | 8:40:13 pm | 14h 27m 11s | 1m 53s | 12:57:27 pm | 59° | 4:36:41 am | 9:18:12 pm | 3:54:34 am | 10:00:19 pm | 9h 31m 55s | 🌘 (4%) |
| Sat, May 16 | 5:13:41 am | 5:42:57 am | 8:11:59 pm | 8:41:15 pm | 14h 29m 2s | 1m 51s | 12:57:28 pm | 59.3° | 4:35:32 am | 9:19:24 pm | 3:53:09 am | 10:01:47 pm | 9h 30m 6s | 🌘 (1%) |
| Sun, May 17 | 5:12:43 am | 5:42:05 am | 8:12:55 pm | 8:42:16 pm | 14h 30m 50s | 1m 48s | 12:57:30 pm | 59.5° | 4:34:24 am | 9:20:35 pm | 3:51:46 am | 10:03:14 pm | 9h 28m 19s | 🌑 (0%) |
| Mon, May 18 | 5:11:47 am | 5:41:14 am | 8:13:50 pm | 8:43:17 pm | 14h 32m 36s | 1m 46s | 12:57:32 pm | 59.7° | 4:33:19 am | 9:21:46 pm | 3:50:24 am | 10:04:40 pm | 9h 26m 35s | 🌒 (3%) |
| Tue, May 19 | 5:10:53 am | 5:40:25 am | 8:14:45 pm | 8:44:17 pm | 14h 34m 20s | 1m 44s | 12:57:35 pm | 59.9° | 4:32:15 am | 9:22:55 pm | 3:49:04 am | 10:06:06 pm | 9h 24m 53s | 🌒 (9%) |
| Wed, May 20 | 5:10:00 am | 5:39:38 am | 8:15:40 pm | 8:45:17 pm | 14h 36m 2s | 1m 42s | 12:57:39 pm | 60.1° | 4:31:13 am | 9:24:04 pm | 3:47:46 am | 10:07:31 pm | 9h 23m 12s | 🌒 (17%) |
| Thu, May 21 | 5:09:09 am | 5:38:52 am | 8:16:33 pm | 8:46:16 pm | 14h 37m 41s | 1m 39s | 12:57:43 pm | 60.3° | 4:30:13 am | 9:25:13 pm | 3:46:30 am | 10:08:55 pm | 9h 21m 35s | 🌒 (26%) |
| Fri, May 22 | 5:08:20 am | 5:38:08 am | 8:17:26 pm | 8:47:14 pm | 14h 39m 18s | 1m 37s | 12:57:47 pm | 60.5° | 4:29:14 am | 9:26:20 pm | 3:45:16 am | 10:10:18 pm | 9h 20m 0s | 🌒 (37%) |
| Sat, May 23 | 5:07:33 am | 5:37:26 am | 8:18:18 pm | 8:48:11 pm | 14h 40m 52s | 1m 34s | 12:57:52 pm | 60.7° | 4:28:18 am | 9:27:26 pm | 3:44:04 am | 10:11:40 pm | 9h 18m 28s | 🌓 (48%) |
| Sun, May 24 | 5:06:48 am | 5:36:46 am | 8:19:10 pm | 8:49:08 pm | 14h 42m 24s | 1m 32s | 12:57:58 pm | 60.9° | 4:27:24 am | 9:28:32 pm | 3:42:54 am | 10:13:01 pm | 9h 16m 58s | 🌔 (58%) |
| Mon, May 25 | 5:06:05 am | 5:36:08 am | 8:20:00 pm | 8:50:03 pm | 14h 43m 52s | 1m 28s | 12:58:04 pm | 61.1° | 4:26:32 am | 9:29:36 pm | 3:41:47 am | 10:14:21 pm | 9h 15m 31s | 🌔 (68%) |
| Tue, May 26 | 5:05:23 am | 5:35:31 am | 8:20:50 pm | 8:50:58 pm | 14h 45m 19s | 1m 27s | 12:58:10 pm | 61.2° | 4:25:41 am | 9:30:39 pm | 3:40:41 am | 10:15:39 pm | 9h 14m 6s | 🌔 (77%) |
| Wed, May 27 | 5:04:44 am | 5:34:56 am | 8:21:39 pm | 8:51:51 pm | 14h 46m 43s | 1m 24s | 12:58:17 pm | 61.4° | 4:24:53 am | 9:31:41 pm | 3:39:39 am | 10:16:56 pm | 9h 12m 44s | 🌔 (85%) |
| Thu, May 28 | 5:04:06 am | 5:34:23 am | 8:22:26 pm | 8:52:44 pm | 14h 48m 3s | 1m 20s | 12:58:25 pm | 61.6° | 4:24:08 am | 9:32:42 pm | 3:38:38 am | 10:18:12 pm | 9h 11m 26s | 🌔 (91%) |
| Fri, May 29 | 5:03:31 am | 5:33:52 am | 8:23:13 pm | 8:53:35 pm | 14h 49m 21s | 1m 18s | 12:58:33 pm | 61.7° | 4:23:24 am | 9:33:41 pm | 3:37:40 am | 10:19:26 pm | 9h 10m 10s | 🌔 (96%) |
| Sat, May 30 | 5:02:57 am | 5:33:23 am | 8:23:59 pm | 8:54:25 pm | 14h 50m 36s | 1m 15s | 12:58:41 pm | 61.9° | 4:22:43 am | 9:34:40 pm | 3:36:45 am | 10:20:38 pm | 9h 8m 57s | 🌔 (99%) |
| Sun, May 31 | 5:02:26 am | 5:32:56 am | 8:24:44 pm | 8:55:14 pm | 14h 51m 48s | 1m 12s | 12:58:50 pm | 62° | 4:22:04 am | 9:35:36 pm | 3:35:52 am | 10:21:48 pm | 9h 7m 47s | 🌕 (100%) |
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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 - 2026
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.