The sun, month by month
Sunrise and sunset in Seattle in August
On August 1 in Seattle the sun rises at 05:47 and sets at 20:44; on day 31 it rises at 06:28 and sets at 19:50. Over the month the day gets 95 minutes shorter.
Where does the sun rise and set in Seattle in August?
Mid-August in Seattle: the sun rises in the east — a bearing of 68°, measured from true north — and sets in the west, at 292°. That is 22° north of due east at sunrise, and the same 22° north of due west at sunset. From the 1st to the last day of the month both points shift 15° south.
Approximate bearings: they can be a couple of degrees out. They are measured from true north, not the north a phone compass points to.
Day by day
All times are local to Seattle. Dawn and dusk mark civil twilight.
| Day | Dawn | Sunrise | Sunset | Dusk | Day length |
|---|---|---|---|---|---|
| 1 | 05:11 | 05:47 | 20:44 | 21:20 | 14 h 57 min |
| 2 | 05:12 | 05:48 | 20:42 | 21:18 | 14 h 54 min |
| 3 | 05:14 | 05:49 | 20:41 | 21:17 | 14 h 51 min |
| 4 | 05:15 | 05:51 | 20:39 | 21:15 | 14 h 49 min |
| 5 | 05:17 | 05:52 | 20:38 | 21:13 | 14 h 46 min |
| 6 | 05:18 | 05:53 | 20:36 | 21:12 | 14 h 43 min |
| 7 | 05:20 | 05:55 | 20:35 | 21:10 | 14 h 40 min |
| 8 | 05:21 | 05:56 | 20:33 | 21:08 | 14 h 37 min |
| 9 | 05:23 | 05:58 | 20:31 | 21:06 | 14 h 34 min |
| 10 | 05:24 | 05:59 | 20:30 | 21:04 | 14 h 31 min |
| 11 | 05:26 | 06:00 | 20:28 | 21:03 | 14 h 28 min |
| 12 | 05:27 | 06:02 | 20:26 | 21:01 | 14 h 25 min |
| 13 | 05:29 | 06:03 | 20:25 | 20:59 | 14 h 22 min |
| 14 | 05:31 | 06:04 | 20:23 | 20:57 | 14 h 18 min |
| 15 | 05:32 | 06:06 | 20:21 | 20:55 | 14 h 15 min |
| 16 | 05:34 | 06:07 | 20:19 | 20:53 | 14 h 12 min |
| 17 | 05:35 | 06:09 | 20:17 | 20:51 | 14 h 09 min |
| 18 | 05:37 | 06:10 | 20:16 | 20:49 | 14 h 06 min |
| 19 | 05:38 | 06:11 | 20:14 | 20:47 | 14 h 02 min |
| 20 | 05:40 | 06:13 | 20:12 | 20:45 | 13 h 59 min |
| 21 | 05:41 | 06:14 | 20:10 | 20:43 | 13 h 56 min |
| 22 | 05:43 | 06:16 | 20:08 | 20:41 | 13 h 52 min |
| 23 | 05:44 | 06:17 | 20:06 | 20:39 | 13 h 49 min |
| 24 | 05:46 | 06:18 | 20:04 | 20:37 | 13 h 46 min |
| 25 | 05:47 | 06:20 | 20:02 | 20:35 | 13 h 42 min |
| 26 | 05:49 | 06:21 | 20:00 | 20:33 | 13 h 39 min |
| 27 | 05:50 | 06:23 | 19:58 | 20:31 | 13 h 36 min |
| 28 | 05:52 | 06:24 | 19:56 | 20:28 | 13 h 32 min |
| 29 | 05:53 | 06:25 | 19:54 | 20:26 | 13 h 29 min |
| 30 | 05:55 | 06:27 | 19:52 | 20:24 | 13 h 25 min |
| 31 | 05:56 | 06:28 | 19:50 | 20:22 | 13 h 22 min |
Approximate astronomical values: they can shift a minute or two from year to year.
What about vitamin D in August?
In August, the typical synthesis window in Seattle runs from 10:00 to 17:00: with medium skin and a t-shirt, ~8 min at the best moment is enough.
See the Seattle vitamin D guideCommon questions about the sun in Seattle in August
- Where does the sun set in Seattle in August?
- Mid-August in Seattle: the sun sets in the west, a bearing of 292° measured from true north, which is 22° north of due west. It rises in the east, at 68°. Over the month both points shift 15° south.
- How much daylight does Seattle lose in August?
- Over August the day gets 95 minutes shorter in Seattle: on August 1 the sun rises at 05:47 and sets at 20:44, and on day 31 it rises at 06:28 and sets at 19:50.
- How many hours of daylight does Seattle get in August?
- In mid-August the day lasts 14 h 15 min in Seattle, from sunrise at 06:06 to sunset at 20:21. The table has the day length for each of the 31 days of the month.
- What time does it start to get light in Seattle in August?
- In mid-August the sky starts to get light at 05:32 in Seattle, when the sun is 6° below the horizon, and the sun itself does not rise until 06:06. The “Dawn” column of the table gives that time for every day of the month.
- What time does it get dark in Seattle in August?
- It's not the same time as sunset. In mid-August in Seattle the sun sets at 20:21, but there is still light: civil twilight does not end until 20:55, when the sun reaches 6° below the horizon and usable outdoor light runs out. The “Dusk” column of the table gives that time day by day.
- What time of day can you make vitamin D in Seattle in August?
- In mid-August, between 10:00 and 17:00: that is the stretch of the day when the UV index reaches 3 in Seattle, the minimum for the skin to make vitamin D. At the best moment of the day about 8 minutes are enough for a mid-range skin phototype with a quarter of the body exposed to make around 1000 IU.