Vineyard Weather in December
Average highs run from 59°F on December 1 to 55°F on December 31, and lows from 42°F to 40°F. Normal precipitation for the month is 3.49 in over about 10 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 56°F
- Average low
- 41°F
- Precipitation
- 3.49 in
- Record high
- 72°FDec 1, 2021
- Record low
- 17°FDec 11, 1932
- Chance of a freeze
- 56%
- Daylight
- 9 h 41 min to 9 h 32 min
- Cloud cover
- 60%
- Humidity
- 70%
- Dew point
- 37°F
- Wind
- 6.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 59°F | 42°F | 72°F 2021 | 32°F 1886 | 30% |
| Dec 2 | 59°F | 42°F | 71°F 2011 | 30°F 1906 | 31% |
| Dec 3 | 59°F | 42°F | 71°F 1958 | 31°F 2004 | 31% |
| Dec 4 | 58°F | 42°F | 71°F 1958 | 29°F 1909 | 31% |
| Dec 5 | 58°F | 41°F | 72°F 1979 | 29°F 2013 | 31% |
| Dec 6 | 58°F | 41°F | 70°F 1989 | 28°F 2009 | 32% |
| Dec 7 | 58°F | 41°F | 72°F 2020 | 28°F 1891 | 32% |
| Dec 8 | 57°F | 41°F | 71°F 1943 | 27°F 1972 | 32% |
| Dec 9 | 57°F | 41°F | 69°F 1893 | 23°F 1932 | 32% |
| Dec 10 | 57°F | 41°F | 68°F 1905 | 22°F 1932 | 32% |
| Dec 11 | 57°F | 41°F | 71°F 1958 | 17°F 1932 | 32% |
| Dec 12 | 57°F | 41°F | 71°F 1958 | 21°F 1932 | 33% |
| Dec 13 | 56°F | 41°F | 71°F 1988 | 23°F 1932 | 33% |
| Dec 14 | 56°F | 41°F | 69°F 1958 | 24°F 1883 | 33% |
| Dec 15 | 56°F | 41°F | 72°F 1958 | 26°F 1932 | 33% |
| Dec 16 | 56°F | 40°F | 70°F 1958 | 26°F 1892 | 33% |
| Dec 17 | 56°F | 40°F | 69°F 1958 | 28°F 1878 | 33% |
| Dec 18 | 56°F | 40°F | 68°F 1958 | 28°F 1908 | 33% |
| Dec 19 | 56°F | 40°F | 71°F 1999 | 25°F 1924 | 33% |
| Dec 20 | 56°F | 40°F | 66°F 1981 | 27°F 1928 | 33% |
| Dec 21 | 56°F | 40°F | 66°F 1999 | 22°F 1990 | 33% |
| Dec 22 | 55°F | 40°F | 67°F 1999 | 18°F 1990 | 33% |
| Dec 23 | 55°F | 40°F | 66°F 1964 | 21°F 1990 | 32% |
| Dec 24 | 55°F | 40°F | 66°F 1901 | 23°F 1990 | 32% |
| Dec 25 | 55°F | 40°F | 64°F 1892 | 26°F 1879 | 33% |
| Dec 26 | 55°F | 40°F | 65°F 1967 | 25°F 1879 | 33% |
| Dec 27 | 55°F | 40°F | 68°F 1917 | 27°F 1878 | 33% |
| Dec 28 | 55°F | 40°F | 72°F 1967 | 26°F 1930 | 33% |
| Dec 29 | 55°F | 40°F | 66°F 1967 | 24°F 1878 | 33% |
| Dec 30 | 55°F | 40°F | 63°F 2023 | 28°F 1893 | 33% |
| Dec 31 | 55°F | 40°F | 67°F 1996 | 24°F 1915 | 33% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:04 AM, sunset 4:45 PM
- December 31
- sunrise 7:23 AM, sunset 4:55 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00023271 (Sacramento 5 Ese), public domain. Records: NOAA GHCN-Daily, station USW00023271, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.