Sunrise and sunset times in Boulder, MT
Check out today's and tomorrow's sunrise and sunset times in Boulder, as well as the whole calendar for September 2026.
Today
September 16, 2026. Current time: 5:09:32 am
First light at 6:38:13 am
Sunrise time: 7:06:48 am
Sunset time: 7:39:37 pm
Last light at 8:08:12 pm
Sun position chart
Now · Sun altitude: -20.4° (below the horizon) · Azimuth: 63° (NE)
Daylight Golden Hour Dawn & dusk (civil twilight) Night
Day length: 12 hours, 32 minutes
14 hours, 30 minutes left for today's sunset in Boulder
Moon will rise on Sep 16 at 1:39 PM
Moon will set on Sep 16 at 9:49 PMMoon phase: 🌒 Waxing Crescent (28%)🌕 Full moon: Sep 26 at 10:50 AM · 🌑 New moon: Oct 10 at 9:50 AMTomorrow
September 17, 2026
First light at 6:39:31 am
Sunrise time: 7:08:04 am
Sunset time: 7:37:39 pm
Last light at 8:06:11 pm
Day length: 12 hours, 29 minutes
Tomorrow will be 3 minutes shorter than today in Boulder
Moon will rise on Sep 17 at 2:42 PM Moon will set on Sep 17 at 10:30 PMMoon phase: 🌒 Waxing Crescent (44%)
- Boulder, Montana
- Latitude: 46.236595 (North)
- Longitude: -112.120834 (West)
- Time zone: Mountain Time MDT
Shortest day in Boulder, MT
The shortest day of the year will be in around 3 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 was 2 months and 25 days ago, during the summer solstice on June 21, 2026, with a daylight length of 15 hours and 50 minutes.
September 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 September in Boulder.
The day length shortens by 1 hour, 33 minutes over the course of September 2026 in Boulder, MT - from 13 hours, 20 minutes on the first day to 11 hours, 47 minutes on the last day.
| Day | First Light | Sunrise | Sunset | Last Light | 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, Sep 1 | 6:18:28 am | 6:47:55 am | 8:08:51 pm | 8:38:17 pm | 13h 20m 56s | -3m 10s | 1:28:23 pm | 51.8° | 5:41:05 am | 9:15:41 pm | 5:01:13 am | 9:55:33 pm | 10h 40m 19s | 🌖 (73%) |
| Wed, Sep 2 | 6:19:49 am | 6:49:10 am | 8:06:57 pm | 8:36:18 pm | 13h 17m 47s | -3m 9s | 1:28:04 pm | 51.4° | 5:42:34 am | 9:13:33 pm | 5:02:56 am | 9:53:11 pm | 10h 43m 29s | 🌖 (62%) |
| Thu, Sep 3 | 6:21:09 am | 6:50:26 am | 8:05:02 pm | 8:34:19 pm | 13h 14m 36s | -3m 11s | 1:27:44 pm | 51.1° | 5:44:02 am | 9:11:26 pm | 5:04:39 am | 9:50:49 pm | 10h 46m 39s | 🌖 (51%) |
| Fri, Sep 4 | 6:22:28 am | 6:51:41 am | 8:03:07 pm | 8:32:20 pm | 13h 11m 26s | -3m 10s | 1:27:24 pm | 50.7° | 5:45:30 am | 9:09:18 pm | 5:06:20 am | 9:48:28 pm | 10h 49m 50s | 🌗 (40%) |
| Sat, Sep 5 | 6:23:48 am | 6:52:57 am | 8:01:11 pm | 8:30:20 pm | 13h 8m 14s | -3m 12s | 1:27:04 pm | 50.3° | 5:46:58 am | 9:07:10 pm | 5:08:01 am | 9:46:07 pm | 10h 53m 1s | 🌘 (29%) |
| Sun, Sep 6 | 6:25:07 am | 6:54:12 am | 7:59:15 pm | 8:28:20 pm | 13h 5m 3s | -3m 11s | 1:26:44 pm | 50° | 5:48:25 am | 9:05:02 pm | 5:09:41 am | 9:43:46 pm | 10h 56m 13s | 🌘 (19%) |
| Mon, Sep 7 | 6:26:27 am | 6:55:28 am | 7:57:18 pm | 8:26:20 pm | 13h 1m 50s | -3m 13s | 1:26:23 pm | 49.6° | 5:49:52 am | 9:02:54 pm | 5:11:20 am | 9:41:26 pm | 10h 59m 25s | 🌘 (11%) |
| Tue, Sep 8 | 6:27:46 am | 6:56:43 am | 7:55:21 pm | 8:24:19 pm | 12h 58m 38s | -3m 12s | 1:26:02 pm | 49.2° | 5:51:18 am | 9:00:47 pm | 5:12:58 am | 9:39:06 pm | 11h 2m 38s | 🌘 (5%) |
| Wed, Sep 9 | 6:29:05 am | 6:57:59 am | 7:53:24 pm | 8:22:18 pm | 12h 55m 25s | -3m 13s | 1:25:42 pm | 48.8° | 5:52:44 am | 8:58:39 pm | 5:14:36 am | 9:36:47 pm | 11h 5m 50s | 🌘 (1%) |
| Thu, Sep 10 | 6:30:23 am | 6:59:14 am | 7:51:27 pm | 8:20:18 pm | 12h 52m 13s | -3m 12s | 1:25:21 pm | 48.5° | 5:54:09 am | 8:56:32 pm | 5:16:12 am | 9:34:29 pm | 11h 9m 3s | 🌑 (0.0%) |
| Fri, Sep 11 | 6:31:42 am | 7:00:30 am | 7:49:29 pm | 8:18:17 pm | 12h 48m 59s | -3m 14s | 1:24:59 pm | 48.1° | 5:55:35 am | 8:54:24 pm | 5:17:48 am | 9:32:11 pm | 11h 12m 16s | 🌒 (2%) |
| Sat, Sep 12 | 6:33:01 am | 7:01:45 am | 7:47:31 pm | 8:16:16 pm | 12h 45m 46s | -3m 13s | 1:24:38 pm | 47.7° | 5:56:59 am | 8:52:17 pm | 5:19:23 am | 9:29:53 pm | 11h 15m 30s | 🌒 (5%) |
| Sun, Sep 13 | 6:34:19 am | 7:03:01 am | 7:45:33 pm | 8:14:15 pm | 12h 42m 32s | -3m 14s | 1:24:17 pm | 47.3° | 5:58:23 am | 8:50:10 pm | 5:20:57 am | 9:27:36 pm | 11h 18m 44s | 🌒 (11%) |
| Mon, Sep 14 | 6:35:37 am | 7:04:17 am | 7:43:34 pm | 8:12:14 pm | 12h 39m 17s | -3m 15s | 1:23:56 pm | 46.9° | 5:59:47 am | 8:48:04 pm | 5:22:31 am | 9:25:20 pm | 11h 21m 58s | 🌒 (18%) |
| Tue, Sep 15 | 6:36:55 am | 7:05:32 am | 7:41:36 pm | 8:10:13 pm | 12h 36m 4s | -3m 13s | 1:23:34 pm | 46.6° | 6:01:11 am | 8:45:57 pm | 5:24:04 am | 9:23:04 pm | 11h 25m 12s | 🌒 (26%) |
| Wed, Sep 16 | 6:38:13 am | 7:06:48 am | 7:39:37 pm | 8:08:12 pm | 12h 32m 49s | -3m 15s | 1:23:13 pm | 46.2° | 6:02:34 am | 8:43:51 pm | 5:25:36 am | 9:20:49 pm | 11h 28m 27s | 🌒 (35%) |
| Thu, Sep 17 | 6:39:31 am | 7:08:04 am | 7:37:39 pm | 8:06:11 pm | 12h 29m 35s | -3m 14s | 1:22:51 pm | 45.8° | 6:03:57 am | 8:41:45 pm | 5:27:07 am | 9:18:35 pm | 11h 31m 41s | 🌒 (44%) |
| Fri, Sep 18 | 6:40:49 am | 7:09:20 am | 7:35:40 pm | 8:04:11 pm | 12h 26m 20s | -3m 15s | 1:22:30 pm | 45.4° | 6:05:19 am | 8:39:40 pm | 5:28:38 am | 9:16:21 pm | 11h 34m 56s | 🌓 (54%) |
| Sat, Sep 19 | 6:42:07 am | 7:10:36 am | 7:33:41 pm | 8:02:10 pm | 12h 23m 5s | -3m 15s | 1:22:08 pm | 45° | 6:06:42 am | 8:37:35 pm | 5:30:08 am | 9:14:09 pm | 11h 38m 11s | 🌔 (63%) |
| Sun, Sep 20 | 6:43:24 am | 7:11:52 am | 7:31:42 pm | 8:00:10 pm | 12h 19m 50s | -3m 15s | 1:21:47 pm | 44.6° | 6:08:04 am | 8:35:30 pm | 5:31:38 am | 9:11:56 pm | 11h 41m 26s | 🌔 (72%) |
| Mon, Sep 21 | 6:44:42 am | 7:13:08 am | 7:29:43 pm | 7:58:10 pm | 12h 16m 35s | -3m 15s | 1:21:26 pm | 44.2° | 6:09:25 am | 8:33:26 pm | 5:33:07 am | 9:09:45 pm | 11h 44m 41s | 🌔 (80%) |
| Tue, Sep 22 | 6:45:59 am | 7:14:24 am | 7:27:45 pm | 7:56:10 pm | 12h 13m 21s | -3m 14s | 1:21:05 pm | 43.8° | 6:10:47 am | 8:31:23 pm | 5:34:35 am | 9:07:34 pm | 11h 47m 56s | 🌔 (87%) |
| Wed, Sep 23 | 6:47:17 am | 7:15:41 am | 7:25:46 pm | 7:54:10 pm | 12h 10m 5s | -3m 16s | 1:20:43 pm | 43.5° | 6:12:08 am | 8:29:19 pm | 5:36:03 am | 9:05:24 pm | 11h 51m 11s | 🌔 (93%) |
| Thu, Sep 24 | 6:48:35 am | 7:16:57 am | 7:23:48 pm | 7:52:11 pm | 12h 6m 51s | -3m 14s | 1:20:23 pm | 43.1° | 6:13:28 am | 8:27:17 pm | 5:37:30 am | 9:03:15 pm | 11h 54m 26s | 🌔 (98%) |
| Fri, Sep 25 | 6:49:52 am | 7:18:14 am | 7:21:49 pm | 7:50:12 pm | 12h 3m 35s | -3m 16s | 1:20:02 pm | 42.7° | 6:14:49 am | 8:25:15 pm | 5:38:56 am | 9:01:07 pm | 11h 57m 42s | 🌔 (99.7%) |
| Sat, Sep 26 | 6:51:10 am | 7:19:31 am | 7:19:51 pm | 7:48:13 pm | 12h 0m 20s | -3m 15s | 1:19:41 pm | 42.3° | 6:16:09 am | 8:23:13 pm | 5:40:23 am | 8:59:00 pm | 12h 0m 57s | 🌕 (99.6%) |
| Sun, Sep 27 | 6:52:27 am | 7:20:48 am | 7:17:53 pm | 7:46:15 pm | 11h 57m 5s | -3m 15s | 1:19:21 pm | 41.9° | 6:17:29 am | 8:21:12 pm | 5:41:48 am | 8:56:53 pm | 12h 4m 13s | 🌖 (97%) |
| Mon, Sep 28 | 6:53:45 am | 7:22:06 am | 7:15:56 pm | 7:44:17 pm | 11h 53m 50s | -3m 15s | 1:19:01 pm | 41.5° | 6:18:49 am | 8:19:12 pm | 5:43:13 am | 8:54:48 pm | 12h 7m 27s | 🌖 (92%) |
| Tue, Sep 29 | 6:55:02 am | 7:23:23 am | 7:13:58 pm | 7:42:19 pm | 11h 50m 35s | -3m 15s | 1:18:41 pm | 41.1° | 6:20:09 am | 8:17:12 pm | 5:44:38 am | 8:52:43 pm | 12h 10m 43s | 🌖 (85%) |
| Wed, Sep 30 | 6:56:20 am | 7:24:41 am | 7:12:01 pm | 7:40:22 pm | 11h 47m 20s | -3m 15s | 1:18:21 pm | 40.7° | 6:21:29 am | 8:15:13 pm | 5:46:02 am | 8:50:40 pm | 12h 13m 58s | 🌖 (75%) |
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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 following 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.
Daylight Dawn & dusk (civil twilight) Night Solar noon · Vertical steps in the curves = DST clock change
Earliest and latest sunrise and sunset in Boulder, MT
In Boulder, MT, the earliest sunrise of 2026 is on June 15 at 5:34 am, while the latest sunrise is on January 1 at 8:09 am. The earliest sunset is on December 10 at 4:44 pm, and the latest sunset is on June 26 at 9:26 pm.
Boulder, MT gets 7h 10m more daylight on the longest day than on the shortest one (15h 50m versus 8h 40m). Averaged over the whole year, a day lasts 12h 17m.
Boulder, MT Analemma
Due to Earth's tilted axis and slightly elliptical orbit, the Sun is never seen in the same position at noon in Boulder. Throughout the year, it slowly traces this figure-eight:
Move along the curve to read the Sun's altitude and azimuth for any day of the year in Boulder.
Over the year, the 12:00 Sun swings between just 20.1° above the horizon (around Dec 21) and 66.4° (around Jun 18) in Boulder. The smaller loop sits at the top, the signature of a Northern Hemisphere analemma. Notice the whole figure leans east of the meridian: over Boulder the Sun reaches its highest point between 12:12 and 12:42 depending on the time of year, but never at 12:00.
Detailed Analemma Chart
The technical chart below plots one dot per day, labels the first day of each month, marks the solstices, equinoxes, perihelion and aphelion, and draws the noon altitude of the equinoxes (90° minus your latitude) together with its ±23.4° seasonal limits.
Why does the figure look wider here than in the sky view above?
Both draw the same data, but with different conventions. The sky view uses the same scale on both axes, so it shows the analemma with its true proportions, as a camera would capture it: about 47° tall and only a few degrees wide. This chart, like most technical analemma diagrams, stretches each axis independently to fill the plot, expanding the narrow azimuth range several times so its day-to-day variation can actually be read. Also, azimuth is not sky distance: near the zenith, one degree of azimuth spans much less than one degree across the sky, which further widens the figure in this representation.
Places near Boulder, MT
These nearby towns and cities have almost the same sunrise and sunset times as Boulder, MT — the difference is only seconds to a couple of minutes. Select any place to see its own sun calendar:
Jefferson City 11 miWalkerville 24 miHelena 25 miWhitehall 25 miButte 25 miEast Helena 26 miTownsend 29 miDeer Lodge 32 mi