The sun, month by month
Sunrise and sunset in Seattle in September
On September 1 in Seattle the sun rises at 06:30 and sets at 19:48; on day 30 it rises at 07:10 and sets at 18:47. Over the month the day gets 102 minutes shorter.
Sunrise06:49
Sunset19:18
Golden hour18:38–19:18
Day length12 h 29 min
Day by day
All times are local to Seattle. Dawn and dusk mark civil twilight.
| Day | Dawn | Sunrise | Sunset | Dusk | Day length |
|---|---|---|---|---|---|
| 1 | 05:58 | 06:30 | 19:48 | 20:20 | 13 h 18 min |
| 2 | 05:59 | 06:31 | 19:46 | 20:18 | 13 h 15 min |
| 3 | 06:01 | 06:32 | 19:44 | 20:16 | 13 h 12 min |
| 4 | 06:02 | 06:34 | 19:42 | 20:13 | 13 h 08 min |
| 5 | 06:04 | 06:35 | 19:40 | 20:11 | 13 h 05 min |
| 6 | 06:05 | 06:37 | 19:38 | 20:09 | 13 h 01 min |
| 7 | 06:07 | 06:38 | 19:36 | 20:07 | 12 h 58 min |
| 8 | 06:08 | 06:39 | 19:33 | 20:05 | 12 h 54 min |
| 9 | 06:10 | 06:41 | 19:31 | 20:03 | 12 h 51 min |
| 10 | 06:11 | 06:42 | 19:29 | 20:00 | 12 h 47 min |
| 11 | 06:12 | 06:44 | 19:27 | 19:58 | 12 h 43 min |
| 12 | 06:14 | 06:45 | 19:25 | 19:56 | 12 h 40 min |
| 13 | 06:15 | 06:46 | 19:23 | 19:54 | 12 h 36 min |
| 14 | 06:17 | 06:48 | 19:21 | 19:52 | 12 h 33 min |
| 15 | 06:18 | 06:49 | 19:18 | 19:49 | 12 h 29 min |
| 16 | 06:20 | 06:51 | 19:16 | 19:47 | 12 h 26 min |
| 17 | 06:21 | 06:52 | 19:14 | 19:45 | 12 h 22 min |
| 18 | 06:23 | 06:53 | 19:12 | 19:43 | 12 h 19 min |
| 19 | 06:24 | 06:55 | 19:10 | 19:41 | 12 h 15 min |
| 20 | 06:25 | 06:56 | 19:08 | 19:39 | 12 h 12 min |
| 21 | 06:27 | 06:58 | 19:06 | 19:36 | 12 h 08 min |
| 22 | 06:28 | 06:59 | 19:04 | 19:34 | 12 h 05 min |
| 23 | 06:30 | 07:00 | 19:01 | 19:32 | 12 h 01 min |
| 24 | 06:31 | 07:02 | 18:59 | 19:30 | 11 h 58 min |
| 25 | 06:33 | 07:03 | 18:57 | 19:28 | 11 h 54 min |
| 26 | 06:34 | 07:05 | 18:55 | 19:26 | 11 h 50 min |
| 27 | 06:35 | 07:06 | 18:53 | 19:24 | 11 h 47 min |
| 28 | 06:37 | 07:07 | 18:51 | 19:22 | 11 h 43 min |
| 29 | 06:38 | 07:09 | 18:49 | 19:19 | 11 h 40 min |
| 30 | 06:40 | 07:10 | 18:47 | 19:17 | 11 h 36 min |
Approximate astronomical values: they can shift a minute or two from year to year.
What about vitamin D in September?
In September, the typical synthesis window in Seattle runs from 11:00 to 16:00: with medium skin and a t-shirt, ~12 min at the best moment is enough.
See the Seattle vitamin D guide