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