Glenn County Weather in December
Average highs run from 58°F on December 1 to 55°F on December 31, and lows from 34°F to 33°F. Normal precipitation for the month is 3.98 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
- 56°F
- Average low
- 33°F
- Precipitation
- 3.98 in
- Record high
- 78°FDec 1, 2008
- Record low
- 11°FDec 11, 1932
- Chance of a freeze
- 98%
- Daylight
- 9 h 35 min to 9 h 25 min
- Cloud cover
- 57%
- Humidity
- 79%
- Dew point
- 36°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 | 58°F | 34°F | 78°F 2008 | 26°F 1906 | 33% |
| Dec 2 | 58°F | 34°F | 76°F 2002 | 24°F 2009 | 34% |
| Dec 3 | 58°F | 34°F | 72°F 1911 | 24°F 2009 | 34% |
| Dec 4 | 57°F | 34°F | 71°F 1939 | 24°F 1936 | 35% |
| Dec 5 | 57°F | 34°F | 74°F 1929 | 20°F 1972 | 35% |
| Dec 6 | 57°F | 34°F | 71°F 1979 | 23°F 1978 | 35% |
| Dec 7 | 57°F | 34°F | 74°F 1979 | 19°F 2009 | 35% |
| Dec 8 | 56°F | 33°F | 75°F 1912 | 15°F 2009 | 36% |
| Dec 9 | 56°F | 33°F | 72°F 1910 | 13°F 1972 | 36% |
| Dec 10 | 56°F | 33°F | 71°F 1911 | 13°F 1932 | 36% |
| Dec 11 | 56°F | 33°F | 73°F 1951 | 11°F 1932 | 36% |
| Dec 12 | 56°F | 33°F | 75°F 1958 | 11°F 1932 | 36% |
| Dec 13 | 55°F | 33°F | 71°F 1958 | 14°F 1932 | 37% |
| Dec 14 | 55°F | 33°F | 73°F 1911 | 17°F 1932 | 37% |
| Dec 15 | 55°F | 33°F | 71°F 1958 | 23°F 1932 | 37% |
| Dec 16 | 55°F | 33°F | 71°F 1998 | 26°F 1971 | 37% |
| Dec 17 | 55°F | 33°F | 76°F 1998 | 24°F 1924 | 37% |
| Dec 18 | 55°F | 33°F | 70°F 1910 | 18°F 1924 | 37% |
| Dec 19 | 55°F | 33°F | 73°F 1999 | 19°F 1924 | 37% |
| Dec 20 | 55°F | 33°F | 75°F 1999 | 20°F 1911 | 37% |
| Dec 21 | 55°F | 33°F | 71°F 1999 | 20°F 1965 | 37% |
| Dec 22 | 55°F | 33°F | 73°F 1999 | 15°F 1985 | 37% |
| Dec 23 | 55°F | 33°F | 68°F 1967 | 14°F 1985 | 37% |
| Dec 24 | 55°F | 33°F | 72°F 1967 | 16°F 1985 | 37% |
| Dec 25 | 55°F | 33°F | 74°F 1967 | 15°F 1985 | 37% |
| Dec 26 | 55°F | 33°F | 75°F 1967 | 15°F 1985 | 37% |
| Dec 27 | 55°F | 33°F | 75°F 1967 | 16°F 1985 | 37% |
| Dec 28 | 55°F | 33°F | 72°F 1967 | 15°F 1985 | 37% |
| Dec 29 | 55°F | 33°F | 72°F 1975 | 18°F 1916 | 37% |
| Dec 30 | 55°F | 33°F | 68°F 1958 | 20°F 1985 | 37% |
| Dec 31 | 55°F | 33°F | 66°F 1989 | 20°F 1915 | 37% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:11 AM, sunset 4:46 PM
- December 31
- sunrise 7:30 AM, sunset 4:55 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00048587 (Stony Gorge Rsvr), public domain. Records: NOAA GHCN-Daily, station USC00041715, 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.