Windsor, CA: shortest day and earliest sunset
The shortest day in Windsor
On Dec 21 the sun rises at 7:25 am and sets at 4:54 pm: 9h 28m of daylight, a moderate winter. The longest day of summer has 14h 52m, so the swing is 5h 23m.
When it gets better in Windsor
- Earliest sunset: 4:50 pm on Dec 6, before the shortest day (here is why).
- Latest sunrise (standard time): 7:29 am on Jan 5.
- Back above 10 hours of daylight: Jan 24.
- By Feb 21 the days grow by 2.4 minutes a day.
Waking and coming home in the dark
With a 7:00 am alarm, the sun is not yet up on 101 weekdays a year. Heading home at 5:30 pm, it has already set on 65. 50 weekdays start and end in the dark. The alarm and lamp guide shows how that compares across the country.
At 38.5°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 Windsor
- A sunrise alarm clock is worth considering if you get up at 7:00 am or earlier: 48 weekday mornings here are still properly dark at that hour, mostly between Sep 23 and Mar 29.
- There is some case for a light therapy lamp: 50 weekdays start and end in the dark. If you notice winter low mood, ask a doctor whether one fits you.
- If you head home at 5:30 pm, the sun has already set from Nov 2 to Jan 29: worth checking your bike lights and porch light before Nov 2.
Daylight in Windsor, month by month
Sunrise, sunset and day length on the 21st of each month, local clock time. December is the darkest, at 9h 28m.
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| July 2026 | 6:04 am | 8:31 pm | 14h 27m |
| August 2026 | 6:31 am | 7:57 pm | 13h 26m |
| September 2026 | 6:58 am | 7:10 pm | 12h 11m |
| October 2026 | 7:27 am | 6:24 pm | 10h 58m |
| November 2026 | 7:00 am | 4:54 pm | 9h 54m |
| December 2026 | 7:25 am | 4:54 pm | 9h 28m |
| January 2027 | 7:25 am | 5:21 pm | 9h 56m |
| February 2027 | 6:54 am | 5:56 pm | 11h 01m |
| March 2027 | 7:13 am | 7:24 pm | 12h 11m |
| April 2027 | 6:27 am | 7:54 pm | 13h 27m |
| May 2027 | 5:55 am | 8:21 pm | 14h 26m |
| June 2027 | 5:47 am | 8:39 pm | 14h 52m |
Windsor against the places around it
On the shortest day, compared with Windsor (9h 28m, sunset 4:54 pm):
- Healdsburg, CA, 6 mi away: 9h 28m of daylight (0 min), sunset 4:54 pm (0 min).
- Santa Rosa, CA, 9 mi away: 9h 29m of daylight (+1 min), sunset 4:54 pm (0 min).
- Rohnert Park, CA, 15 mi away: 9h 30m of daylight (+2 min), sunset 4:54 pm (0 min).
- Petaluma, CA, 23 mi away: 9h 30m of daylight (+2 min), sunset 4:54 pm (0 min).
- Sonoma, CA, 26 mi away: 9h 30m of daylight (+2 min), sunset 4:53 pm (-1 min).