Golden Hour · September 2026
Sunrise, sunset & golden hour in Boulder, Colorado, United States: September 2026
In September 2026, sunrise in Boulder, Colorado, United States moves from 6:30 AM to 6:57 AM and sunset from 7:34 PM to 6:47 PM. All times are shown in the local time of Boulder, Colorado, United States.
Across the month, days in Boulder, Colorado, United States get about 1 hr 15 min shorter.
| Day | Sunrise | Golden hour ends | Golden hour starts | Sunset | Day length |
|---|---|---|---|---|---|
| 1 | 6:30 AM | 7:06 AM | 6:58 PM | 7:34 PM | 13 hr 5 min |
| 2 | 6:31 AM | 7:07 AM | 6:57 PM | 7:33 PM | 13 hr 2 min |
| 3 | 6:32 AM | 7:08 AM | 6:55 PM | 7:31 PM | 13 hr |
| 4 | 6:33 AM | 7:09 AM | 6:54 PM | 7:30 PM | 12 hr 57 min |
| 5 | 6:34 AM | 7:09 AM | 6:52 PM | 7:28 PM | 12 hr 55 min |
| 6 | 6:34 AM | 7:10 AM | 6:51 PM | 7:26 PM | 12 hr 52 min |
| 7 | 6:35 AM | 7:11 AM | 6:49 PM | 7:25 PM | 12 hr 49 min |
| 8 | 6:36 AM | 7:12 AM | 6:47 PM | 7:23 PM | 12 hr 47 min |
| 9 | 6:37 AM | 7:13 AM | 6:46 PM | 7:22 PM | 12 hr 44 min |
| 10 | 6:38 AM | 7:14 AM | 6:44 PM | 7:20 PM | 12 hr 42 min |
| 11 | 6:39 AM | 7:15 AM | 6:42 PM | 7:18 PM | 12 hr 39 min |
| 12 | 6:40 AM | 7:16 AM | 6:41 PM | 7:17 PM | 12 hr 37 min |
| 13 | 6:41 AM | 7:17 AM | 6:39 PM | 7:15 PM | 12 hr 34 min |
| 14 | 6:42 AM | 7:18 AM | 6:38 PM | 7:13 PM | 12 hr 31 min |
| 15 | 6:43 AM | 7:19 AM | 6:36 PM | 7:12 PM | 12 hr 29 min |
| 16 | 6:44 AM | 7:19 AM | 6:34 PM | 7:10 PM | 12 hr 26 min |
| 17 | 6:45 AM | 7:20 AM | 6:33 PM | 7:08 PM | 12 hr 24 min |
| 18 | 6:46 AM | 7:21 AM | 6:31 PM | 7:07 PM | 12 hr 21 min |
| 19 | 6:47 AM | 7:22 AM | 6:29 PM | 7:05 PM | 12 hr 18 min |
| 20 | 6:48 AM | 7:23 AM | 6:28 PM | 7:03 PM | 12 hr 16 min |
| 21 | 6:48 AM | 7:24 AM | 6:26 PM | 7:02 PM | 12 hr 13 min |
| 22 | 6:49 AM | 7:25 AM | 6:24 PM | 7:00 PM | 12 hr 10 min |
| 23 | 6:50 AM | 7:26 AM | 6:22 PM | 6:58 PM | 12 hr 8 min |
| 24 | 6:51 AM | 7:27 AM | 6:21 PM | 6:57 PM | 12 hr 5 min |
| 25 | 6:52 AM | 7:28 AM | 6:19 PM | 6:55 PM | 12 hr 3 min |
| 26 | 6:53 AM | 7:29 AM | 6:17 PM | 6:53 PM | 12 hr |
| 27 | 6:54 AM | 7:30 AM | 6:16 PM | 6:52 PM | 11 hr 57 min |
| 28 | 6:55 AM | 7:31 AM | 6:14 PM | 6:50 PM | 11 hr 55 min |
| 29 | 6:56 AM | 7:32 AM | 6:12 PM | 6:48 PM | 11 hr 52 min |
| 30 | 6:57 AM | 7:33 AM | 6:11 PM | 6:47 PM | 11 hr 50 min |
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Frequently asked questions
What time does the sun set in Boulder, Colorado, United States in September 2026?
Sunset moves from 7:34 PM at the start of September 2026 to 6:47 PM at the end, local time.
How long are the days in Boulder, Colorado, United States in September 2026?
The longest day of the month (September 1, 2026) lasts about 13 hr 5 min; the shortest (September 30, 2026) about 11 hr 50 min.
Data: Meeus astronomical algorithms. How we calculate this
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