San Luis, AZ: shortest day and earliest sunset
The shortest day in San Luis
On Dec 21 the sun rises at 7:37 am and sets at 5:38 pm: 10h 01m of daylight, a bright winter. The longest day of summer has 14h 17m, so the swing is 4h 16m.
When it gets better in San Luis
- Earliest sunset: 5:33 pm on Dec 3, before the shortest day (here is why).
- Latest sunrise (standard time): 7:41 am on Jan 8.
- Daylight never drops below 10 hours here.
- By Feb 21 the days grow by 1.9 minutes a day.
Waking and coming home in the dark
With a 7:00 am alarm, the sun is not yet up on 86 weekdays a year. Heading home at 5:30 pm, it has already set on 0. 0 weekdays start and end in the dark. The alarm and lamp guide shows how that compares across the country.
At 32.5°N this sits between Sarasota FL (27°N, 1.4%) and Nashua NH (43°N, 9.7%) in a 1990 survey of winter depression by latitude.
What to do about it in San Luis
- A sunrise alarm clock is worth considering if you get up at 7:00 am or earlier: 57 weekday mornings here are still properly dark at that hour, mostly between Nov 6 and Mar 5.
- Daylight alone gives little reason for a light therapy lamp here. Getting outside in the 7:37 am to 5:38 pm window on the shortest day does more than most people expect.
- Heading home at 5:30 pm, you get at least some daylight all year here.
Daylight in San Luis, month by month
Sunrise, sunset and day length on the 21st of each month, local clock time. December is the darkest, at 10h 01m.
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| July 2026 | 5:46 am | 7:44 pm | 13h 58m |
| August 2026 | 6:07 am | 7:17 pm | 13h 10m |
| September 2026 | 6:27 am | 6:37 pm | 12h 10m |
| October 2026 | 6:47 am | 5:59 pm | 11h 12m |
| November 2026 | 7:14 am | 5:35 pm | 10h 21m |
| December 2026 | 7:37 am | 5:38 pm | 10h 01m |
| January 2027 | 7:39 am | 6:02 pm | 10h 23m |
| February 2027 | 7:16 am | 6:30 pm | 11h 14m |
| March 2027 | 6:41 am | 6:51 pm | 12h 10m |
| April 2027 | 6:03 am | 7:13 pm | 13h 10m |
| May 2027 | 5:37 am | 7:34 pm | 13h 57m |
| June 2027 | 5:32 am | 7:49 pm | 14h 17m |
San Luis against the places around it
On the shortest day, compared with San Luis (10h 01m, sunset 5:38 pm):
- Somerton, AZ, 8 mi away: 10h 00m of daylight (-1 min), sunset 5:37 pm (-1 min).
- Yuma, AZ, 12 mi away: 10h 01m of daylight (0 min), sunset 5:37 pm (-1 min).
- Calexico, CA, 47 mi away: 10h 00m of daylight (-1 min), sunset 4:40 pm (-58 min), on America/Los Angeles time.
- El Centro, CA, 53 mi away: 9h 59m of daylight (-2 min), sunset 4:40 pm (-58 min), on America/Los Angeles time.
- Imperial, CA, 55 mi away: 9h 59m of daylight (-2 min), sunset 4:40 pm (-58 min), on America/Los Angeles time.