The sun, month by month
Sunrise and sunset in Santiago in December
On December 1 in Santiago the sun rises at 06:26 and sets at 20:39; on day 31 it rises at 06:36 and sets at 20:56. Over the month the day grows 6 minutes longer.
In Santiago (-33.5° latitude), December 2026 has 31 days whose sun rises at 06:26 and sets at 20:39 on the 1st, and at 06:36 and 20:56 on the 31th. Mid-month the day lasts 14 h 22 min and the sun reaches 80° above the horizon. Vitamin D synthesis is possible between 10:00 and 18:00, which is when the UV index reaches at least 3: at the best moment of the day about 5 minutes are enough for a mid-range skin phototype with a quarter of the body exposed to make around 1000 IU.
Where does the sun rise and set in Santiago in December?
Mid-December in Santiago: the sun rises in the southeast — a bearing of 119°, measured from true north — and sets in the southwest, at 241°. That is 29° south of due east at sunrise, and the same 29° south of due west at sunset. From the 1st to the last day of the month both points barely move.
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 Santiago. Dawn and dusk mark civil twilight.
| Day | Dawn | Sunrise | Sunset | Dusk | Day length |
|---|---|---|---|---|---|
| 1 | 05:57 | 06:26 | 20:39 | 21:08 | 14 h 13 min |
| 2 | 05:57 | 06:26 | 20:40 | 21:09 | 14 h 14 min |
| 3 | 05:57 | 06:26 | 20:41 | 21:09 | 14 h 15 min |
| 4 | 05:57 | 06:26 | 20:42 | 21:10 | 14 h 16 min |
| 5 | 05:57 | 06:26 | 20:42 | 21:11 | 14 h 17 min |
| 6 | 05:57 | 06:26 | 20:43 | 21:12 | 14 h 17 min |
| 7 | 05:57 | 06:26 | 20:44 | 21:13 | 14 h 18 min |
| 8 | 05:57 | 06:26 | 20:45 | 21:13 | 14 h 19 min |
| 9 | 05:57 | 06:26 | 20:45 | 21:14 | 14 h 19 min |
| 10 | 05:58 | 06:26 | 20:46 | 21:15 | 14 h 20 min |
| 11 | 05:58 | 06:27 | 20:47 | 21:16 | 14 h 20 min |
| 12 | 05:58 | 06:27 | 20:47 | 21:16 | 14 h 21 min |
| 13 | 05:58 | 06:27 | 20:48 | 21:17 | 14 h 21 min |
| 14 | 05:59 | 06:27 | 20:49 | 21:18 | 14 h 21 min |
| 15 | 05:59 | 06:28 | 20:49 | 21:18 | 14 h 22 min |
| 16 | 05:59 | 06:28 | 20:50 | 21:19 | 14 h 22 min |
| 17 | 06:00 | 06:28 | 20:50 | 21:19 | 14 h 22 min |
| 18 | 06:00 | 06:29 | 20:51 | 21:20 | 14 h 22 min |
| 19 | 06:00 | 06:29 | 20:51 | 21:20 | 14 h 22 min |
| 20 | 06:01 | 06:30 | 20:52 | 21:21 | 14 h 22 min |
| 21 | 06:01 | 06:30 | 20:52 | 21:21 | 14 h 22 min |
| 22 | 06:02 | 06:31 | 20:53 | 21:22 | 14 h 22 min |
| 23 | 06:02 | 06:31 | 20:53 | 21:22 | 14 h 22 min |
| 24 | 06:03 | 06:32 | 20:54 | 21:23 | 14 h 22 min |
| 25 | 06:03 | 06:32 | 20:54 | 21:23 | 14 h 22 min |
| 26 | 06:04 | 06:33 | 20:54 | 21:23 | 14 h 22 min |
| 27 | 06:05 | 06:33 | 20:55 | 21:24 | 14 h 21 min |
| 28 | 06:05 | 06:34 | 20:55 | 21:24 | 14 h 21 min |
| 29 | 06:06 | 06:35 | 20:55 | 21:24 | 14 h 21 min |
| 30 | 06:06 | 06:35 | 20:56 | 21:24 | 14 h 20 min |
| 31 | 06:07 | 06:36 | 20:56 | 21:25 | 14 h 20 min |
Approximate astronomical values: they can shift a minute or two from year to year.
What about vitamin D in December?
In December, the typical synthesis window in Santiago runs from 10:00 to 18:00: with medium skin and a t-shirt, ~5 min at the best moment is enough.
See the Santiago vitamin D guideCommon questions about the sun in Santiago in December
- Where does the sun set in Santiago in December?
- Mid-December in Santiago: the sun sets in the southwest, a bearing of 241° measured from true north, which is 29° south of due west. It rises in the southeast, at 119°. Over the month both points barely move.
- How much daylight does Santiago gain in December?
- Over December the day gets 6 minutes longer in Santiago: on December 1 the sun rises at 06:26 and sets at 20:39, and on day 31 it rises at 06:36 and sets at 20:56.
- How many hours of daylight does Santiago get in December?
- In mid-December the day lasts 14 h 22 min in Santiago, from sunrise at 06:28 to sunset at 20:49. The table has the day length for each of the 31 days of the month.
- What time does it start to get light in Santiago in December?
- In mid-December the sky starts to get light at 05:59 in Santiago, when the sun is 6° below the horizon, and the sun itself does not rise until 06:28. The “Dawn” column of the table gives that time for every day of the month.
- What time does it get dark in Santiago in December?
- It's not the same time as sunset. In mid-December in Santiago the sun sets at 20:49, but there is still light: civil twilight does not end until 21:18, 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 Santiago in December?
- In mid-December, between 10:00 and 18:00: that is the stretch of the day when the UV index reaches 3 in Santiago, the minimum for the skin to make vitamin D. At the best moment of the day about 5 minutes are enough for a mid-range skin phototype with a quarter of the body exposed to make around 1000 IU.