The sun, month by month
Sunrise and sunset in Chicago in August
On August 1 in Chicago the sun rises at 05:44 and sets at 20:09; on day 31 it rises at 06:16 and sets at 19:24. Over the month the day gets 77 minutes shorter.
Sunrise05:59
Sunset19:50
Golden hour19:12–19:50
Day length13 h 51 min
Day by day
All times are local to Chicago. Dawn and dusk mark civil twilight.
| Day | Dawn | Sunrise | Sunset | Dusk | Day length |
|---|---|---|---|---|---|
| 1 | 05:13 | 05:44 | 20:09 | 20:40 | 14 h 25 min |
| 2 | 05:14 | 05:45 | 20:08 | 20:39 | 14 h 22 min |
| 3 | 05:15 | 05:46 | 20:06 | 20:38 | 14 h 20 min |
| 4 | 05:16 | 05:47 | 20:05 | 20:36 | 14 h 18 min |
| 5 | 05:17 | 05:48 | 20:04 | 20:35 | 14 h 16 min |
| 6 | 05:19 | 05:49 | 20:03 | 20:34 | 14 h 13 min |
| 7 | 05:20 | 05:51 | 20:01 | 20:32 | 14 h 11 min |
| 8 | 05:21 | 05:52 | 20:00 | 20:31 | 14 h 09 min |
| 9 | 05:22 | 05:53 | 19:59 | 20:29 | 14 h 06 min |
| 10 | 05:23 | 05:54 | 19:57 | 20:28 | 14 h 04 min |
| 11 | 05:24 | 05:55 | 19:56 | 20:26 | 14 h 01 min |
| 12 | 05:26 | 05:56 | 19:55 | 20:25 | 13 h 59 min |
| 13 | 05:27 | 05:57 | 19:53 | 20:23 | 13 h 56 min |
| 14 | 05:28 | 05:58 | 19:52 | 20:22 | 13 h 54 min |
| 15 | 05:29 | 05:59 | 19:50 | 20:20 | 13 h 51 min |
| 16 | 05:30 | 06:00 | 19:49 | 20:19 | 13 h 48 min |
| 17 | 05:32 | 06:01 | 19:47 | 20:17 | 13 h 46 min |
| 18 | 05:33 | 06:02 | 19:46 | 20:15 | 13 h 43 min |
| 19 | 05:34 | 06:03 | 19:44 | 20:14 | 13 h 41 min |
| 20 | 05:35 | 06:05 | 19:43 | 20:12 | 13 h 38 min |
| 21 | 05:36 | 06:06 | 19:41 | 20:10 | 13 h 35 min |
| 22 | 05:37 | 06:07 | 19:39 | 20:09 | 13 h 33 min |
| 23 | 05:39 | 06:08 | 19:38 | 20:07 | 13 h 30 min |
| 24 | 05:40 | 06:09 | 19:36 | 20:05 | 13 h 27 min |
| 25 | 05:41 | 06:10 | 19:34 | 20:04 | 13 h 24 min |
| 26 | 05:42 | 06:11 | 19:33 | 20:02 | 13 h 22 min |
| 27 | 05:43 | 06:12 | 19:31 | 20:00 | 13 h 19 min |
| 28 | 05:44 | 06:13 | 19:29 | 19:58 | 13 h 16 min |
| 29 | 05:46 | 06:14 | 19:28 | 19:56 | 13 h 13 min |
| 30 | 05:47 | 06:15 | 19:26 | 19:55 | 13 h 11 min |
| 31 | 05:48 | 06:16 | 19:24 | 19:53 | 13 h 08 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 Chicago runs from 10:00 to 17:00: with medium skin and a t-shirt, ~7 min at the best moment is enough.
See the Chicago vitamin D guide