Fossil Weather in December
Average highs run from 42°F on December 1 to 41°F on December 31, and lows from 26°F to 25°F. Normal precipitation for the month is 1.76 in over about 4 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
- 41°F
- Average low
- 24°F
- Precipitation
- 1.76 in
- Snowfall
- 10.3 in
- Record high
- 75°FDec 5, 1939
- Record low
- -18°FDec 12, 1919
- Chance of a freeze
- 100%
- Daylight
- 9 h 02 min to 8 h 50 min
- Cloud cover
- 73%
- Humidity
- 84%
- Dew point
- 26°F
- Wind
- 10.1 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 | 42°F | 26°F | 68°F 1972 | -4°F 1985 | 17% | 10% |
| Dec 2 | 42°F | 25°F | 64°F 1926 | 3°F 1985 | 16% | 11% |
| Dec 3 | 42°F | 25°F | 65°F 1927 | 11°F 1992 | 16% | 11% |
| Dec 4 | 41°F | 25°F | 65°F 1915 | -1°F 1972 | 16% | 11% |
| Dec 5 | 41°F | 25°F | 75°F 1939 | -2°F 1972 | 16% | 12% |
| Dec 6 | 41°F | 25°F | 64°F 2023 | 4°F 1898 | 15% | 12% |
| Dec 7 | 41°F | 25°F | 65°F 1938 | -7°F 1972 | 15% | 12% |
| Dec 8 | 41°F | 25°F | 65°F 1915 | -15°F 1972 | 15% | 13% |
| Dec 9 | 41°F | 24°F | 64°F 1933 | -11°F 1972 | 15% | 13% |
| Dec 10 | 41°F | 24°F | 71°F 1957 | -12°F 1972 | 15% | 13% |
| Dec 11 | 40°F | 24°F | 67°F 1924 | -9°F 1932 | 15% | 13% |
| Dec 12 | 40°F | 24°F | 69°F 1921 | -18°F 1919 | 14% | 14% |
| Dec 13 | 40°F | 24°F | 66°F 1895 | -18°F 1919 | 14% | 14% |
| Dec 14 | 40°F | 24°F | 68°F 2025 | -15°F 1919 | 14% | 14% |
| Dec 15 | 40°F | 24°F | 70°F 1980 | -12°F 1919 | 14% | 14% |
| Dec 16 | 40°F | 24°F | 67°F 1942 | -10°F 1932 | 14% | 15% |
| Dec 17 | 40°F | 24°F | 64°F 1976 | -15°F 1964 | 14% | 15% |
| Dec 18 | 40°F | 24°F | 66°F 1917 | -8°F 1964 | 14% | 15% |
| Dec 19 | 40°F | 24°F | 61°F 1936 | -7°F 1924 | 14% | 15% |
| Dec 20 | 40°F | 24°F | 60°F 1956 | -11°F 1990 | 14% | 16% |
| Dec 21 | 40°F | 24°F | 66°F 1933 | -15°F 1990 | 14% | 16% |
| Dec 22 | 40°F | 24°F | 64°F 1933 | -12°F 1990 | 15% | 16% |
| Dec 23 | 40°F | 24°F | 67°F 1950 | -14°F 1983 | 15% | 16% |
| Dec 24 | 40°F | 24°F | 64°F 1919 | -11°F 1983 | 15% | 16% |
| Dec 25 | 40°F | 24°F | 66°F 1980 | -10°F 1924 | 15% | 16% |
| Dec 26 | 41°F | 24°F | 68°F 1980 | -4°F 1924 | 15% | 16% |
| Dec 27 | 41°F | 24°F | 64°F 1980 | 5°F 1924 | 15% | 17% |
| Dec 28 | 41°F | 24°F | 63°F 1917 | 4°F 1978 | 15% | 17% |
| Dec 29 | 41°F | 24°F | 64°F 1917 | -10°F 1990 | 15% | 17% |
| Dec 30 | 41°F | 24°F | 64°F 1917 | -12°F 1990 | 15% | 17% |
| Dec 31 | 41°F | 25°F | 62°F 1917 | -10°F 1978 | 15% | 17% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:19 AM, sunset 4:21 PM
- December 31
- sunrise 7:39 AM, sunset 4:29 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00353038 (Fossil), public domain. Records: NOAA GHCN-Daily, station USC00353827, 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.