Blacklake Weather in December
Average highs run from 66°F on December 1 to 65°F on December 31, and lows from 44°F to 44°F. Normal precipitation for the month is 3.08 in over about 8 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
- 65°F
- Average low
- 44°F
- Precipitation
- 3.08 in
- Record high
- 90°FDec 3, 1958
- Record low
- 20°FDec 7, 1978
- Chance of a freeze
- 21%
- Daylight
- 9 h 58 min to 9 h 51 min
- Cloud cover
- 49%
- Humidity
- 72%
- Dew point
- 43°F
- Wind
- 9.2 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 | 66°F | 44°F | 86°F 1949 | 28°F 2004 | 21% |
| Dec 2 | 66°F | 44°F | 88°F 1958 | 28°F 2004 | 21% |
| Dec 3 | 66°F | 44°F | 90°F 1958 | 28°F 1978 | 21% |
| Dec 4 | 65°F | 44°F | 81°F 1962 | 29°F 2004 | 21% |
| Dec 5 | 65°F | 44°F | 84°F 1977 | 30°F 2013 | 22% |
| Dec 6 | 65°F | 44°F | 82°F 1979 | 25°F 2013 | 22% |
| Dec 7 | 65°F | 43°F | 84°F 2017 | 20°F 1978 | 22% |
| Dec 8 | 65°F | 43°F | 84°F 1975 | 21°F 1978 | 23% |
| Dec 9 | 65°F | 43°F | 83°F 1957 | 24°F 1978 | 23% |
| Dec 10 | 65°F | 43°F | 84°F 1958 | 25°F 1972 | 23% |
| Dec 11 | 65°F | 43°F | 87°F 1958 | 26°F 1963 | 24% |
| Dec 12 | 65°F | 43°F | 86°F 1958 | 24°F 1985 | 24% |
| Dec 13 | 65°F | 44°F | 81°F 1953 | 24°F 1967 | 24% |
| Dec 14 | 65°F | 44°F | 82°F 1953 | 21°F 1967 | 24% |
| Dec 15 | 65°F | 44°F | 79°F 1976 | 24°F 1975 | 25% |
| Dec 16 | 65°F | 44°F | 83°F 1980 | 28°F 1971 | 25% |
| Dec 17 | 65°F | 44°F | 83°F 1979 | 28°F 1965 | 25% |
| Dec 18 | 65°F | 44°F | 80°F 2024 | 27°F 2016 | 25% |
| Dec 19 | 65°F | 44°F | 80°F 2024 | 28°F 1971 | 26% |
| Dec 20 | 65°F | 44°F | 80°F 1985 | 27°F 1965 | 26% |
| Dec 21 | 65°F | 44°F | 79°F 1999 | 25°F 1998 | 26% |
| Dec 22 | 65°F | 44°F | 76°F 1960 | 21°F 1990 | 26% |
| Dec 23 | 65°F | 44°F | 79°F 1989 | 22°F 1990 | 27% |
| Dec 24 | 65°F | 44°F | 81°F 1989 | 21°F 1998 | 27% |
| Dec 25 | 65°F | 44°F | 85°F 1980 | 23°F 1987 | 27% |
| Dec 26 | 65°F | 44°F | 84°F 1980 | 24°F 1962 | 28% |
| Dec 27 | 65°F | 44°F | 84°F 2013 | 25°F 1966 | 28% |
| Dec 28 | 65°F | 44°F | 81°F 1956 | 23°F 1966 | 29% |
| Dec 29 | 65°F | 44°F | 82°F 1980 | 26°F 1966 | 29% |
| Dec 30 | 65°F | 44°F | 83°F 1980 | 28°F 1969 | 29% |
| Dec 31 | 65°F | 44°F | 82°F 2011 | 27°F 1975 | 29% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 6:52 AM, sunset 4:50 PM
- December 31
- sunrise 7:10 AM, sunset 5:01 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00046943 (Pismo Beach), public domain. Records: NOAA GHCN-Daily, station USW00023273, 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.