Daily sunrise, sunset, and daylight duration for Boulder throughout September 2021. Plan photography, golden hour, and travel with accurate day-by-day sun data.
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| Mi., 1. Sept. | 6:29 | 19:31 | 13h 03m |
| Do., 2. Sept. | 6:30 | 19:30 | 13h 00m |
| Fr., 3. Sept. | 6:31 | 19:28 | 12h 58m |
| Sa., 4. Sept. | 6:31 | 19:27 | 12h 55m |
| So., 5. Sept. | 6:32 | 19:25 | 12h 53m |
| Mo., 6. Sept. | 6:33 | 19:23 | 12h 50m |
| Di., 7. Sept. | 6:34 | 19:22 | 12h 48m |
| Mi., 8. Sept. | 6:35 | 19:20 | 12h 45m |
| Do., 9. Sept. | 6:36 | 19:19 | 12h 42m |
| Fr., 10. Sept. | 6:37 | 19:17 | 12h 40m |
| Sa., 11. Sept. | 6:38 | 19:15 | 12h 37m |
| So., 12. Sept. | 6:39 | 19:14 | 12h 35m |
| Mo., 13. Sept. | 6:40 | 19:12 | 12h 32m |
| Di., 14. Sept. | 6:41 | 19:10 | 12h 29m |
| Mi., 15. Sept. | 6:42 | 19:09 | 12h 27m |
| Do., 16. Sept. | 6:43 | 19:07 | 12h 24m |
| Fr., 17. Sept. | 6:44 | 19:05 | 12h 22m |
| Sa., 18. Sept. | 6:45 | 19:04 | 12h 19m |
| So., 19. Sept. | 6:46 | 19:02 | 12h 16m |
| Mo., 20. Sept. | 6:47 | 19:00 | 12h 14m |
| Di., 21. Sept. | 6:48 | 18:59 | 12h 11m |
| Mi., 22. Sept. | 6:48 | 18:57 | 12h 09m |
| Do., 23. Sept. | 6:49 | 18:55 | 12h 06m |
| Fr., 24. Sept. | 6:50 | 18:54 | 12h 03m |
| Sa., 25. Sept. | 6:51 | 18:52 | 12h 01m |
| So., 26. Sept. | 6:52 | 18:50 | 11h 58m |
| Mo., 27. Sept. | 6:53 | 18:49 | 11h 56m |
| Di., 28. Sept. | 6:54 | 18:47 | 11h 53m |
| Mi., 29. Sept. | 6:55 | 18:46 | 11h 50m |
| Do., 30. Sept. | 6:56 | 18:44 | 11h 48m |
Daily sunrise, sunset, and daylight duration for Boulder in the selected month.
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