July 20, 2026 · San Luis, Argentina
Sunset in San Luis today is at 18:39. Day length is 10h 14m. See below for sunrise, solar noon, dawn and dusk — all times calculated astronomically for San Luis's coordinates and updated daily.
San Luis lies at 33°S. At this latitude, day length varies moderately — from around 10 hours in midwinter to 14–15 hours in midsummer.
Sunset shifts later through spring and earlier through autumn — changing fastest near the equinoxes and slowest near the summer and winter solstices. See the year chart to visualise how sunset times shift month by month for San Luis.
The longest day in San Luis is around 14h 21m (around December 21). The shortest is around 9h 57m (around June 21). Days are currently getting longer — gaining about 1 minute per day.
| Month | Sunset | Sunrise | Day length |
|---|---|---|---|
| January | 20:39 | 06:31 | 14h 8m |
| February | 20:19 | 07:01 | 13h 18m |
| March | 19:46 | 07:25 | 12h 21m |
| April | 19:05 | 07:47 | 11h 18m |
| May | 18:36 | 08:09 | 10h 26m |
| June | 18:25 | 08:28 | 9h 58m |
| July | 18:36 | 08:28 | 10h 8m |
| August | 18:56 | 08:05 | 10h 51m |
| September | 19:17 | 07:27 | 11h 50m |
| October | 19:38 | 06:46 | 12h 51m |
| November | 20:05 | 06:16 | 13h 49m |
| December | 20:31 | 06:11 | 14h 20m |