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.
Where does the sun rise and set in Chicago in August?
Mid-August in Chicago: the sun rises in the east — a bearing of 71°, measured from true north — and sets in the west, at 289°. That is 19° north of due east at sunrise, and the same 19° north of due west at sunset. From the 1st to the last day of the month both points shift 14° 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 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 guideCommon questions about the sun in Chicago in August
- Where does the sun set in Chicago in August?
- Mid-August in Chicago: the sun sets in the west, a bearing of 289° measured from true north, which is 19° north of due west. It rises in the east, at 71°. Over the month both points shift 14° south.
- How much daylight does Chicago lose in August?
- Over August the day gets 77 minutes shorter in Chicago: on August 1 the sun rises at 05:44 and sets at 20:09, and on day 31 it rises at 06:16 and sets at 19:24.
- How many hours of daylight does Chicago get in August?
- In mid-August the day lasts 13 h 51 min in Chicago, from sunrise at 05:59 to sunset at 19:50. The table has the day length for each of the 31 days of the month.
- What time does it start to get light in Chicago in August?
- In mid-August the sky starts to get light at 05:29 in Chicago, when the sun is 6° below the horizon, and the sun itself does not rise until 05:59. The “Dawn” column of the table gives that time for every day of the month.
- What time does it get dark in Chicago in August?
- It's not the same time as sunset. In mid-August in Chicago the sun sets at 19:50, but there is still light: civil twilight does not end until 20:20, 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 Chicago 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 Chicago, the minimum for the skin to make vitamin D. At the best moment of the day about 7 minutes are enough for a mid-range skin phototype with a quarter of the body exposed to make around 1000 IU.