Lake County climate

Lake County Weather in December

NOAA 1991-2020 normals for Clearlake 4 Se, 25.3 km from Lake County

Average highs run from 58°F on December 1 to 54°F on December 31, and lows from 33°F to 32°F. Normal precipitation for the month is 6.08 in over about 13 wet days.

December day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Lake County, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
55°F
Average low
33°F
Precipitation
6.08 in
Record high
84°FDec 3, 2006
Record low
18°FDec 9, 2013
Chance of a freeze
99%
Daylight
9 h 38 min to 9 h 28 min
Cloud cover
57%
Humidity
82%
Dew point
39°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.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Dec 158°F33°F75°F 202124°F 200737%0%
Dec 257°F33°F73°F 201125°F 200437%0%
Dec 357°F33°F84°F 200623°F 200437%0%
Dec 457°F33°F83°F 200624°F 200438%0%
Dec 557°F33°F74°F 202421°F 201338%0%
Dec 656°F33°F82°F 200620°F 201338%0%
Dec 756°F33°F77°F 202023°F 200938%0%
Dec 856°F33°F72°F 202020°F 200939%0%
Dec 956°F33°F67°F 202518°F 201339%0%
Dec 1055°F33°F72°F 202521°F 201339%0%
Dec 1155°F33°F73°F 202524°F 201339%0%
Dec 1255°F33°F68°F 202525°F 201339%0%
Dec 1355°F33°F66°F 202526°F 201140%0%
Dec 1455°F33°F69°F 201727°F 201340%0%
Dec 1555°F33°F66°F 201327°F 200540%0%
Dec 1654°F33°F72°F 202327°F 200640%0%
Dec 1754°F32°F67°F 201123°F 200840%0%
Dec 1854°F32°F66°F 200324°F 201640%0%
Dec 1954°F32°F69°F 202425°F 200640%0%
Dec 2054°F32°F64°F 201126°F 200641%0%
Dec 2154°F32°F67°F 202326°F 201741%0%
Dec 2254°F32°F69°F 201323°F 201141%0%
Dec 2354°F32°F69°F 201324°F 201141%0%
Dec 2454°F32°F69°F 201325°F 201141%0%
Dec 2554°F32°F66°F 201326°F 200742%0%
Dec 2654°F32°F67°F 201324°F 201642%0%
Dec 2754°F32°F64°F 202425°F 200342%0%
Dec 2854°F32°F65°F 201324°F 201342%0%
Dec 2954°F32°F67°F 201325°F 201342%0%
Dec 3054°F32°F68°F 201326°F 201343%0%
Dec 3154°F32°F66°F 201323°F 201443%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Lake County, in percent, and of at least 0.1 inch of snowfall.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PST).

December 1
sunrise 7:11 AM, sunset 4:49 PM
December 31
sunrise 7:30 AM, sunset 4:58 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00041806 (Clearlake 4 Se), public domain. Records: NOAA GHCN-Daily, station USW00023275, 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.