Rough and Ready Weather in December
Average highs run from 54°F on December 1 to 53°F on December 31, and lows from 34°F to 32°F. Normal precipitation for the month is 10.48 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
- 53°F
- Average low
- 33°F
- Precipitation
- 10.48 in
- Snowfall
- 1.2 in
- Record high
- 86°FDec 13, 1924
- Record low
- -1°FDec 9, 1972
- Chance of a freeze
- 99%
- Daylight
- 9 h 37 min to 9 h 27 min
- Cloud cover
- 60%
- Humidity
- 70%
- Dew point
- 36°F
- Wind
- 6.7 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 | 54°F | 34°F | 77°F 1907 | 18°F 1936 | 36% | 1% |
| Dec 2 | 54°F | 34°F | 81°F 1911 | 20°F 1936 | 37% | 1% |
| Dec 3 | 54°F | 34°F | 75°F 1932 | 21°F 1909 | 37% | 1% |
| Dec 4 | 54°F | 34°F | 75°F 1939 | 15°F 1936 | 37% | 1% |
| Dec 5 | 53°F | 33°F | 80°F 1925 | 16°F 1972 | 38% | 1% |
| Dec 6 | 53°F | 33°F | 80°F 1925 | 14°F 1909 | 38% | 1% |
| Dec 7 | 53°F | 33°F | 74°F 1925 | 17°F 1978 | 38% | 1% |
| Dec 8 | 53°F | 33°F | 74°F 1925 | 8°F 1972 | 38% | 1% |
| Dec 9 | 53°F | 33°F | 75°F 1938 | -1°F 1972 | 38% | 1% |
| Dec 10 | 53°F | 33°F | 73°F 1938 | 0°F 1972 | 39% | 1% |
| Dec 11 | 53°F | 33°F | 78°F 1924 | 3°F 1972 | 39% | 1% |
| Dec 12 | 52°F | 33°F | 82°F 1924 | 4°F 1972 | 39% | 1% |
| Dec 13 | 52°F | 32°F | 86°F 1924 | 8°F 1972 | 39% | 1% |
| Dec 14 | 52°F | 32°F | 82°F 1924 | 8°F 1972 | 39% | 1% |
| Dec 15 | 52°F | 32°F | 74°F 1942 | 9°F 1972 | 39% | 1% |
| Dec 16 | 52°F | 32°F | 76°F 1980 | 14°F 1928 | 39% | 1% |
| Dec 17 | 52°F | 32°F | 71°F 1942 | 15°F 1967 | 39% | 1% |
| Dec 18 | 52°F | 32°F | 72°F 1917 | 8°F 1924 | 39% | 1% |
| Dec 19 | 52°F | 32°F | 74°F 1917 | 9°F 1924 | 39% | 1% |
| Dec 20 | 52°F | 32°F | 73°F 1904 | 16°F 1949 | 39% | 1% |
| Dec 21 | 52°F | 32°F | 75°F 1906 | 12°F 1990 | 39% | 1% |
| Dec 22 | 52°F | 32°F | 72°F 1915 | 12°F 1990 | 39% | 1% |
| Dec 23 | 52°F | 32°F | 72°F 1902 | 13°F 1990 | 39% | 1% |
| Dec 24 | 52°F | 32°F | 74°F 1946 | 14°F 1990 | 39% | 1% |
| Dec 25 | 52°F | 32°F | 73°F 1925 | 9°F 1916 | 39% | 1% |
| Dec 26 | 52°F | 32°F | 75°F 1929 | 13°F 1926 | 39% | 1% |
| Dec 27 | 52°F | 32°F | 72°F 1919 | 12°F 1916 | 39% | 1% |
| Dec 28 | 52°F | 32°F | 75°F 1919 | 16°F 1954 | 39% | 1% |
| Dec 29 | 52°F | 32°F | 75°F 1917 | 14°F 1915 | 39% | 1% |
| Dec 30 | 53°F | 32°F | 75°F 1917 | 14°F 1911 | 39% | 1% |
| Dec 31 | 53°F | 32°F | 74°F 1917 | 12°F 1915 | 39% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:05 AM, sunset 4:42 PM
- December 31
- sunrise 7:24 AM, sunset 4:51 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00043573 (Grass Valley #2), public domain. Records: NOAA GHCN-Daily, station USC00046136, 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.