Fortuna Weather in December
Average highs run from 57°F on December 1 to 55°F on December 31, and lows from 43°F to 42°F. Normal precipitation for the month is 9.68 in over about 18 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
- 55°F
- Average low
- 42°F
- Precipitation
- 9.68 in
- Record high
- 73°FDec 31, 1963
- Record low
- 17°FDec 12, 1932
- Chance of a freeze
- 46%
- Daylight
- 9 h 29 min to 9 h 19 min
- Cloud cover
- 64%
- Humidity
- 88%
- Dew point
- 37°F
- Wind
- 4.9 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 | 57°F | 43°F | 69°F 1949 | 32°F 1991 | 54% | 0% |
| Dec 2 | 56°F | 43°F | 70°F 1941 | 33°F 1948 | 54% | 0% |
| Dec 3 | 56°F | 42°F | 72°F 1958 | 31°F 2022 | 54% | 0% |
| Dec 4 | 56°F | 42°F | 70°F 1979 | 30°F 1994 | 55% | 0% |
| Dec 5 | 56°F | 42°F | 71°F 1989 | 27°F 2013 | 55% | 0% |
| Dec 6 | 56°F | 42°F | 68°F 2019 | 29°F 2013 | 55% | 0% |
| Dec 7 | 56°F | 42°F | 66°F 1938 | 28°F 1951 | 55% | 0% |
| Dec 8 | 55°F | 42°F | 69°F 2006 | 27°F 2013 | 56% | 0% |
| Dec 9 | 55°F | 42°F | 69°F 1981 | 26°F 1932 | 56% | 0% |
| Dec 10 | 55°F | 42°F | 69°F 1950 | 25°F 1932 | 56% | 0% |
| Dec 11 | 55°F | 42°F | 71°F 1943 | 19°F 1932 | 56% | 0% |
| Dec 12 | 55°F | 42°F | 69°F 2004 | 17°F 1932 | 56% | 0% |
| Dec 13 | 55°F | 41°F | 66°F 1944 | 24°F 1932 | 56% | 0% |
| Dec 14 | 55°F | 41°F | 65°F 1962 | 23°F 1932 | 56% | 0% |
| Dec 15 | 55°F | 41°F | 69°F 1962 | 26°F 1967 | 56% | 0% |
| Dec 16 | 55°F | 41°F | 69°F 1944 | 26°F 1965 | 56% | 0% |
| Dec 17 | 55°F | 41°F | 68°F 1931 | 27°F 1965 | 56% | 0% |
| Dec 18 | 55°F | 41°F | 71°F 1979 | 28°F 1946 | 57% | 0% |
| Dec 19 | 55°F | 41°F | 67°F 1950 | 29°F 1946 | 57% | 0% |
| Dec 20 | 55°F | 41°F | 67°F 1947 | 27°F 1990 | 57% | 0% |
| Dec 21 | 55°F | 41°F | 69°F 1944 | 22°F 1990 | 57% | 0% |
| Dec 22 | 55°F | 41°F | 68°F 1955 | 18°F 1990 | 57% | 0% |
| Dec 23 | 55°F | 41°F | 67°F 1946 | 19°F 1990 | 57% | 0% |
| Dec 24 | 55°F | 41°F | 72°F 2005 | 22°F 1990 | 57% | 0% |
| Dec 25 | 55°F | 41°F | 69°F 2005 | 24°F 1990 | 57% | 0% |
| Dec 26 | 55°F | 41°F | 67°F 1980 | 24°F 1990 | 57% | 0% |
| Dec 27 | 55°F | 41°F | 72°F 1980 | 29°F 1954 | 57% | 0% |
| Dec 28 | 55°F | 42°F | 64°F 1963 | 30°F 1954 | 57% | 0% |
| Dec 29 | 55°F | 42°F | 66°F 1980 | 29°F 1955 | 57% | 0% |
| Dec 30 | 55°F | 42°F | 67°F 1926 | 22°F 1978 | 57% | 0% |
| Dec 31 | 55°F | 42°F | 73°F 1963 | 22°F 1978 | 57% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:21 AM, sunset 4:50 PM
- December 31
- sunrise 7:40 AM, sunset 4:59 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00048045 (Scotia), public domain. Records: NOAA GHCN-Daily, station USC00048045, 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.