Santa Clara County Weather in December
Average highs run from 50°F on December 1 to 49°F on December 31, and lows from 39°F to 39°F. Normal precipitation for the month is 4.72 in over about 12 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
- 49°F
- Average low
- 38°F
- Precipitation
- 4.72 in
- Snowfall
- 2.1 in
- Record high
- 79°FDec 12, 1958
- Record low
- 19°FDec 22, 1990
- Chance of a freeze
- 94%
- Daylight
- 9 h 47 min to 9 h 38 min
- Cloud cover
- 52%
- Humidity
- 76%
- Dew point
- 39°F
- Wind
- 6.0 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 50°F | 39°F | 72°F 1907 | 28°F 1896 | 36% | 3% |
| Dec 2 | 50°F | 39°F | 75°F 1958 | 26°F 1906 | 36% | 3% |
| Dec 3 | 49°F | 39°F | 75°F 1958 | 29°F 1909 | 36% | 3% |
| Dec 4 | 49°F | 38°F | 75°F 1958 | 26°F 1909 | 37% | 3% |
| Dec 5 | 49°F | 38°F | 73°F 1925 | 29°F 1972 | 37% | 4% |
| Dec 6 | 49°F | 38°F | 75°F 1925 | 32°F 1904 | 37% | 4% |
| Dec 7 | 49°F | 38°F | 76°F 1938 | 29°F 1896 | 37% | 4% |
| Dec 8 | 49°F | 38°F | 75°F 1893 | 28°F 1916 | 38% | 4% |
| Dec 9 | 48°F | 38°F | 71°F 1893 | 26°F 1972 | 38% | 4% |
| Dec 10 | 48°F | 38°F | 69°F 1926 | 24°F 1972 | 38% | 4% |
| Dec 11 | 48°F | 38°F | 74°F 1958 | 23°F 1972 | 38% | 4% |
| Dec 12 | 48°F | 38°F | 79°F 1958 | 20°F 1932 | 38% | 5% |
| Dec 13 | 48°F | 38°F | 70°F 1911 | 21°F 1932 | 38% | 5% |
| Dec 14 | 48°F | 38°F | 73°F 1958 | 25°F 1919 | 39% | 5% |
| Dec 15 | 48°F | 38°F | 68°F 1958 | 25°F 1932 | 39% | 5% |
| Dec 16 | 48°F | 38°F | 70°F 1998 | 27°F 1893 | 39% | 5% |
| Dec 17 | 48°F | 38°F | 72°F 1958 | 26°F 1965 | 39% | 5% |
| Dec 18 | 48°F | 38°F | 69°F 1937 | 25°F 1908 | 39% | 5% |
| Dec 19 | 48°F | 38°F | 70°F 1950 | 23°F 1924 | 39% | 5% |
| Dec 20 | 48°F | 38°F | 72°F 1999 | 26°F 1908 | 39% | 6% |
| Dec 21 | 48°F | 38°F | 69°F 1929 | 25°F 1968 | 39% | 6% |
| Dec 22 | 48°F | 38°F | 69°F 2024 | 19°F 1990 | 38% | 6% |
| Dec 23 | 49°F | 38°F | 74°F 2024 | 19°F 1990 | 38% | 6% |
| Dec 24 | 49°F | 38°F | 72°F 1901 | 23°F 1990 | 38% | 6% |
| Dec 25 | 49°F | 38°F | 70°F 1901 | 22°F 1894 | 38% | 6% |
| Dec 26 | 49°F | 38°F | 74°F 1967 | 22°F 1924 | 38% | 6% |
| Dec 27 | 49°F | 38°F | 73°F 1967 | 26°F 1912 | 38% | 6% |
| Dec 28 | 49°F | 39°F | 71°F 1967 | 27°F 1918 | 38% | 6% |
| Dec 29 | 49°F | 39°F | 69°F 1967 | 21°F 1895 | 38% | 6% |
| Dec 30 | 49°F | 39°F | 66°F 1921 | 20°F 1895 | 38% | 6% |
| Dec 31 | 49°F | 39°F | 70°F 1958 | 22°F 1895 | 38% | 6% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:02 AM, sunset 4:49 PM
- December 31
- sunrise 7:21 AM, sunset 4:59 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00045933 (Mt Hamilton), public domain. Records: NOAA GHCN-Daily, station USC00047821, 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.