Sunrise and sunset times in Boulder, MT
Check out today's and tomorrow's sunrise and sunset times in Boulder, MT, United States, as well as the whole calendar for May 2026.
Today
May 17, 2026 . Current time: 7:08:52 am
First light at 5:17:04 am
Sunrise time: 5:50:59 am
Sunset time: 8:58:48 pm
Last light at 9:32:44 pm
Day length: 15 hours, 7 minutes
13 hours, 49 minutes left for today's sunset in Boulder
Moon rose on May 17 at 04:58 AM
Moon will set on May 17 at 09:57 PMMoon phase: 🌒 Waxing Crescent (1%)Tomorrow
May 18, 2026
First light at 5:15:50 am
Sunrise time: 5:49:54 am
Sunset time: 8:59:59 pm
Last light at 9:34:03 pm
Day length: 15 hours, 10 minutes
Tomorrow will be approximately 2 minutes longer than today in Boulder
Moon will rise on May 18 at 05:53 AM Moon will set on May 18 at 11:06 PMMoon phase: 🌒 Waxing Crescent (9%)
- Boulder, Montana
- Latitude: 46.236595
- Longitude: -112.120834
- Time zone: Mountain Time MDT
Shortest day in Boulder, MT
The shortest day of the year will be in around 7 months, during the winter solstice on December 21, 2026, with a daylight length of 8 hours and 40 minutes.Longest day in Boulder, MT
The longest day of the year will be in 1 month and 3 days, during the summer solstice on June 21, 2026, with a daylight length of 15 hours and 50 minutes.
May 2026 - Boulder, Montana - 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 1 hour, 8 minutes over the course of May 2026 in Boulder, MT - from 14 hours, 26 minutes on the first day to 15 hours, 34 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 | 5:40:44 am | 6:12:26 am | 8:38:39 pm | 9:10:21 pm | 14h 26m 13s | 14h 26m 13s | 1:25:33 pm | 61.5° | 4:59:04 am | 9:52:01 pm | 4:11:53 am | 10:39:13 pm | 9h 32m 15s | 🌕 (100%) |
| Sat, May 2 | 5:39:04 am | 6:10:54 am | 8:39:58 pm | 9:11:48 pm | 14h 29m 4s | 2m 51s | 1:25:26 pm | 61.8° | 4:57:10 am | 9:53:42 pm | 4:09:30 am | 10:41:22 pm | 9h 29m 26s | 🌖 (100%) |
| Sun, May 3 | 5:37:26 am | 6:09:24 am | 8:41:16 pm | 9:13:14 pm | 14h 31m 52s | 2m 48s | 1:25:20 pm | 62.1° | 4:55:16 am | 9:55:24 pm | 4:07:09 am | 10:43:31 pm | 9h 26m 39s | 🌖 (98%) |
| Mon, May 4 | 5:35:49 am | 6:07:55 am | 8:42:34 pm | 9:14:40 pm | 14h 34m 39s | 2m 47s | 1:25:14 pm | 62.4° | 4:53:23 am | 9:57:05 pm | 4:04:47 am | 10:45:42 pm | 9h 23m 53s | 🌖 (94%) |
| Tue, May 5 | 5:34:13 am | 6:06:27 am | 8:43:52 pm | 9:16:06 pm | 14h 37m 25s | 2m 46s | 1:25:09 pm | 62.7° | 4:51:32 am | 9:58:47 pm | 4:02:26 am | 10:47:53 pm | 9h 21m 9s | 🌖 (89%) |
| Wed, May 6 | 5:32:38 am | 6:05:01 am | 8:45:09 pm | 9:17:32 pm | 14h 40m 8s | 2m 43s | 1:25:05 pm | 62.9° | 4:49:42 am | 10:00:28 pm | 4:00:06 am | 10:50:04 pm | 9h 18m 27s | 🌖 (82%) |
| Thu, May 7 | 5:31:05 am | 6:03:36 am | 8:46:26 pm | 9:18:57 pm | 14h 42m 50s | 2m 42s | 1:25:01 pm | 63.2° | 4:47:53 am | 10:02:10 pm | 3:57:46 am | 10:52:17 pm | 9h 15m 47s | 🌖 (75%) |
| Fri, May 8 | 5:29:34 am | 6:02:13 am | 8:47:43 pm | 9:20:22 pm | 14h 45m 30s | 2m 40s | 1:24:58 pm | 63.5° | 4:46:05 am | 10:03:51 pm | 3:55:26 am | 10:54:30 pm | 9h 13m 8s | 🌖 (66%) |
| Sat, May 9 | 5:28:04 am | 6:00:51 am | 8:48:59 pm | 9:21:47 pm | 14h 48m 8s | 2m 38s | 1:24:55 pm | 63.8° | 4:44:19 am | 10:05:32 pm | 3:53:07 am | 10:56:43 pm | 9h 10m 32s | 🌖 (56%) |
| Sun, May 10 | 5:26:35 am | 5:59:31 am | 8:50:15 pm | 9:23:11 pm | 14h 50m 44s | 2m 36s | 1:24:53 pm | 64° | 4:42:34 am | 10:07:12 pm | 3:50:49 am | 10:58:57 pm | 9h 7m 58s | 🌗 (46%) |
| Mon, May 11 | 5:25:08 am | 5:58:13 am | 8:51:30 pm | 9:24:35 pm | 14h 53m 17s | 2m 33s | 1:24:51 pm | 64.3° | 4:40:50 am | 10:08:53 pm | 3:48:32 am | 11:01:11 pm | 9h 5m 26s | 🌘 (36%) |
| Tue, May 12 | 5:23:43 am | 5:56:56 am | 8:52:45 pm | 9:25:58 pm | 14h 55m 49s | 2m 32s | 1:24:50 pm | 64.5° | 4:39:08 am | 10:10:33 pm | 3:46:15 am | 11:03:26 pm | 9h 2m 56s | 🌘 (26%) |
| Wed, May 13 | 5:22:20 am | 5:55:41 am | 8:53:59 pm | 9:27:20 pm | 14h 58m 18s | 2m 29s | 1:24:50 pm | 64.8° | 4:37:28 am | 10:12:12 pm | 3:44:00 am | 11:05:40 pm | 9h 0m 29s | 🌘 (17%) |
| Thu, May 14 | 5:20:58 am | 5:54:28 am | 8:55:12 pm | 9:28:42 pm | 15h 0m 44s | 2m 26s | 1:24:50 pm | 65° | 4:35:49 am | 10:13:51 pm | 3:41:45 am | 11:07:55 pm | 8h 58m 5s | 🌘 (9%) |
| Fri, May 15 | 5:19:38 am | 5:53:17 am | 8:56:25 pm | 9:30:04 pm | 15h 3m 8s | 2m 24s | 1:24:51 pm | 65.2° | 4:34:12 am | 10:15:29 pm | 3:39:31 am | 11:10:10 pm | 8h 55m 42s | 🌘 (4%) |
| Sat, May 16 | 5:18:20 am | 5:52:07 am | 8:57:37 pm | 9:31:24 pm | 15h 5m 30s | 2m 22s | 1:24:52 pm | 65.5° | 4:32:37 am | 10:17:07 pm | 3:37:19 am | 11:12:26 pm | 8h 53m 22s | 🌘 (1%) |
| Sun, May 17 | 5:17:04 am | 5:50:59 am | 8:58:48 pm | 9:32:44 pm | 15h 7m 49s | 2m 19s | 1:24:54 pm | 65.7° | 4:31:04 am | 10:18:44 pm | 3:35:07 am | 11:14:41 pm | 8h 51m 6s | 🌑 (0%) |
| Mon, May 18 | 5:15:50 am | 5:49:54 am | 8:59:59 pm | 9:34:03 pm | 15h 10m 5s | 2m 16s | 1:24:56 pm | 65.9° | 4:29:32 am | 10:20:20 pm | 3:32:57 am | 11:16:55 pm | 8h 48m 51s | 🌒 (3%) |
| Tue, May 19 | 5:14:37 am | 5:48:50 am | 9:01:08 pm | 9:35:21 pm | 15h 12m 18s | 2m 13s | 1:24:59 pm | 66.1° | 4:28:03 am | 10:21:55 pm | 3:30:49 am | 11:19:10 pm | 8h 46m 40s | 🌒 (9%) |
| Wed, May 20 | 5:13:27 am | 5:47:48 am | 9:02:17 pm | 9:36:38 pm | 15h 14m 29s | 2m 11s | 1:25:03 pm | 66.3° | 4:26:36 am | 10:23:30 pm | 3:28:42 am | 11:21:24 pm | 8h 44m 32s | 🌒 (17%) |
| Thu, May 21 | 5:12:19 am | 5:46:49 am | 9:03:25 pm | 9:37:54 pm | 15h 16m 36s | 2m 7s | 1:25:07 pm | 66.5° | 4:25:11 am | 10:25:03 pm | 3:26:36 am | 11:23:37 pm | 8h 42m 26s | 🌒 (26%) |
| Fri, May 22 | 5:11:13 am | 5:45:51 am | 9:04:32 pm | 9:39:09 pm | 15h 18m 41s | 2m 5s | 1:25:11 pm | 66.7° | 4:23:48 am | 10:26:35 pm | 3:24:32 am | 11:25:50 pm | 8h 40m 23s | 🌒 (37%) |
| Sat, May 23 | 5:10:10 am | 5:44:55 am | 9:05:37 pm | 9:40:23 pm | 15h 20m 42s | 2m 1s | 1:25:16 pm | 66.9° | 4:22:27 am | 10:28:05 pm | 3:22:30 am | 11:28:02 pm | 8h 38m 25s | 🌓 (48%) |
| Sun, May 24 | 5:09:08 am | 5:44:02 am | 9:06:42 pm | 9:41:36 pm | 15h 22m 40s | 1m 58s | 1:25:22 pm | 67.1° | 4:21:09 am | 10:29:35 pm | 3:20:30 am | 11:30:14 pm | 8h 36m 29s | 🌔 (58%) |
| Mon, May 25 | 5:08:09 am | 5:43:11 am | 9:07:45 pm | 9:42:47 pm | 15h 24m 34s | 1m 54s | 1:25:28 pm | 67.3° | 4:19:53 am | 10:31:03 pm | 3:18:33 am | 11:32:23 pm | 8h 34m 37s | 🌔 (68%) |
| Tue, May 26 | 5:07:12 am | 5:42:22 am | 9:08:48 pm | 9:43:57 pm | 15h 26m 26s | 1m 52s | 1:25:35 pm | 67.5° | 4:18:40 am | 10:32:29 pm | 3:16:37 am | 11:34:32 pm | 8h 32m 47s | 🌔 (77%) |
| Wed, May 27 | 5:06:18 am | 5:41:35 am | 9:09:49 pm | 9:45:05 pm | 15h 28m 14s | 1m 48s | 1:25:42 pm | 67.6° | 4:17:30 am | 10:33:54 pm | 3:14:44 am | 11:36:39 pm | 8h 31m 1s | 🌔 (85%) |
| Thu, May 28 | 5:05:26 am | 5:40:50 am | 9:10:48 pm | 9:46:12 pm | 15h 29m 58s | 1m 44s | 1:25:49 pm | 67.8° | 4:16:22 am | 10:35:17 pm | 3:12:53 am | 11:38:45 pm | 8h 29m 20s | 🌔 (91%) |
| Fri, May 29 | 5:04:36 am | 5:40:08 am | 9:11:46 pm | 9:47:18 pm | 15h 31m 38s | 1m 40s | 1:25:57 pm | 67.9° | 4:15:16 am | 10:36:38 pm | 3:11:05 am | 11:40:49 pm | 8h 27m 42s | 🌔 (96%) |
| Sat, May 30 | 5:03:49 am | 5:39:28 am | 9:12:43 pm | 9:48:22 pm | 15h 33m 15s | 1m 37s | 1:26:05 pm | 68.1° | 4:14:14 am | 10:37:57 pm | 3:09:21 am | 11:42:50 pm | 8h 26m 7s | 🌔 (99%) |
| Sun, May 31 | 5:03:04 am | 5:38:50 am | 9:13:39 pm | 9:49:24 pm | 15h 34m 49s | 1m 34s | 1:26:14 pm | 68.2° | 4:13:15 am | 10:39:14 pm | 3:07:39 am | 11:44:50 pm | 8h 24m 35s | 🌕 (100%) |
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Sunrise and Sunset photos in Boulder, MT
Enjoy this beautiful gallery of images of the sunset and sunrise at Boulder, MT. All images provided by our fantastic community of photographers!
Year distribution of sunrise and sunset times in Boulder, MT - 2026
The followin graph shows sunrise and sunset times in Boulder, MT 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, MT.