Vacaville, CA · 2026
Sunrise and sunset in Vacaville, California
Short answer
- Longest day
- 14 h 51 min
- Shortest day
- 9 h 29 min
Vacaville daylight through 2026
Daylight in Vacaville runs from 9 h 29 min on December 21 to 14 h 51 min on June 21, a seasonal swing of 5 h 21 min between June 21 and December 21. That swing ranks 124th of 342 US cities of 100,000+, where 1st is the largest. Around the March equinox the city gets 12 h 09 min, and around the September equinox 12 h 09 min.
Vacaville daylight by month
| Month | Average | Sunrise | Sunset |
|---|---|---|---|
| January | 9 h 51 min | 7:13 AM to 7:25 AM | 4:58 PM to 5:29 PM |
| February | 10 h 48 min | 6:40 AM to 7:12 AM | 5:30 PM to 6:00 PM |
| March | 11 h 59 min | 6:30 AM to 7:29 AM | 6:01 PM to 7:30 PM |
| April | 13 h 14 min | 6:12 AM to 6:52 AM | 7:31 PM to 7:58 PM |
| May | 14 h 16 min | 5:46 AM to 6:10 AM | 7:59 PM to 8:25 PM |
| June | 14 h 48 min | 5:43 AM to 5:47 AM | 8:26 PM to 8:35 PM |
| July | 14 h 31 min | 5:48 AM to 6:09 AM | 8:18 PM to 8:35 PM |
| August | 13 h 36 min | 6:10 AM to 6:36 AM | 7:38 PM to 8:17 PM |
| September | 12 h 25 min | 6:37 AM to 7:02 AM | 6:51 PM to 7:37 PM |
| October | 11 h 11 min | 7:03 AM to 7:33 AM | 6:09 PM to 6:50 PM |
| November | 10 h 06 min | 6:34 AM to 7:05 AM | 4:47 PM to 5:08 PM |
| December | 9 h 33 min | 7:06 AM to 7:24 AM | 4:47 PM to 4:57 PM |
Earliest sunrise, latest sunset and the clock
The earliest sunrise comes on June 9 at 5:43 AM and the latest sunset on June 21 at 8:35 PM. The latest sunrise is 7:33 AM on October 31. Daylight saving time starts and ends on March 8 and November 1, which shifts every clock time by an hour.
On standard time the clocks run 8 hours behind UTC, the time of the 120° W meridian. Vacaville sits at 121.97° W, so the sun runs about 8 minutes behind the zone clock. Solar noon is at 12:17 PM on January 15 and 1:13 PM on July 15.
Compared with nearby cities
Sacramento, the state capital, gets 1 minutes more daylight than Vacaville on June 21 and 1 minutes less on December 21. Day length depends on latitude, so the table lists the paired cities from north to south.
| City | Latitude | June 21 | December 21 |
|---|---|---|---|
| Chico, CA | 39.76° N | 14 h 59 min | 9 h 21 min |
| Sparks, NV | 39.57° N | 14 h 58 min | 9 h 22 min |
| Reno, NV | 39.55° N | 14 h 58 min | 9 h 22 min |
| Roseville, CA | 38.77° N | 14 h 53 min | 9 h 27 min |
| Sacramento, CA | 38.57° N | 14 h 52 min | 9 h 28 min |
| Santa Rosa, CA | 38.45° N | 14 h 51 min | 9 h 29 min |
| Elk Grove, CA | 38.41° N | 14 h 51 min | 9 h 29 min |
| Vacaville, CA | 38.36° N | 14 h 51 min | 9 h 29 min |
| Fairfield, CA | 38.26° N | 14 h 50 min | 9 h 30 min |
| Vallejo, CA | 38.11° N | 14 h 49 min | 9 h 31 min |
| Antioch, CA | 37.98° N | 14 h 48 min | 9 h 32 min |
| Stockton, CA | 37.98° N | 14 h 48 min | 9 h 32 min |
| Concord, CA | 37.97° N | 14 h 48 min | 9 h 32 min |
| Richmond, CA | 37.95° N | 14 h 48 min | 9 h 32 min |
| Berkeley, CA | 37.87° N | 14 h 48 min | 9 h 32 min |
Questions people ask
What is the longest day of the year in Vacaville?
June 21, 2026, with 14 h 51 min of daylight: sunrise 5:44 AM, sunset 8:35 PM.
What is the shortest day in Vacaville?
December 21, 2026, with 9 h 29 min: sunrise 7:21 AM, sunset 4:50 PM.
When is the latest sunset in Vacaville?
8:35 PM on June 21, 2026. The earliest sunset is 4:47 PM on November 30.
What time zone is Vacaville in?
America/Los_Angeles. Clocks change on March 8 (to PDT) and November 1 (to PST) in 2026.
Sources and data as of
Data as of: computed for 2026 at the Census internal point of Vacaville, 38.359° N, 121.969° W; time zone from Open-Meteo.
- 01SunCalc library (Vladimir Agafonkin), algorithms after Jean Meeus
- 02IANA time zone database (clock times and daylight saving rules)
How every number is computed: methodology. Spotted a wrong figure? Report an error.