Trinity County climate

Trinity County Weather in December

NOAA 1991-2020 normals for Big Bar 4 E, 12.8 km from Trinity County

Average highs run from 50°F on December 1 to 47°F on December 31, and lows from 36°F to 34°F. Normal precipitation for the month is 7.24 in over about 15 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 Trinity County, in °F, with the record for each date.-20020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
48°F
Average low
34°F
Precipitation
7.24 in
Snowfall
1.1 in
Record high
85°FDec 1, 1910
Record low
-10°FDec 9, 1972
Chance of a freeze
97%
Daylight
9 h 29 min to 9 h 19 min
Cloud cover
61%
Humidity
87%
Dew point
32°F
Wind
3.8 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 150°F36°F85°F 19108°F 193647%1%
Dec 250°F36°F67°F 192914°F 193647%1%
Dec 350°F35°F66°F 19216°F 193648%1%
Dec 449°F35°F73°F 19273°F 193648%1%
Dec 549°F35°F68°F 19299°F 201348%1%
Dec 649°F35°F73°F 193413°F 195948%1%
Dec 748°F35°F69°F 19299°F 197848%1%
Dec 848°F35°F65°F 1934-7°F 197248%1%
Dec 948°F35°F66°F 1934-10°F 197248%2%
Dec 1048°F34°F65°F 1973-7°F 197247%2%
Dec 1148°F34°F68°F 1976-4°F 197247%2%
Dec 1248°F34°F60°F 19215°F 197247%2%
Dec 1347°F34°F61°F 19210°F 191947%2%
Dec 1447°F34°F59°F 19472°F 191947%2%
Dec 1547°F34°F69°F 19626°F 193247%2%
Dec 1647°F34°F60°F 19839°F 191947%2%
Dec 1747°F34°F65°F 198011°F 196547%2%
Dec 1847°F34°F69°F 193510°F 192447%2%
Dec 1947°F34°F62°F 19809°F 192447%2%
Dec 2047°F34°F60°F 19356°F 199047%2%
Dec 2147°F34°F63°F 20130°F 199847%2%
Dec 2247°F33°F64°F 20144°F 199847%2%
Dec 2347°F33°F60°F 19646°F 194847%2%
Dec 2447°F33°F61°F 2005-2°F 199047%2%
Dec 2547°F33°F59°F 1922-3°F 192447%2%
Dec 2647°F33°F66°F 1999-3°F 192448%2%
Dec 2747°F33°F61°F 19939°F 195448%2%
Dec 2847°F33°F58°F 191910°F 193048%2%
Dec 2947°F33°F60°F 201310°F 193048%2%
Dec 3047°F34°F61°F 194511°F 191548%2%
Dec 3147°F34°F71°F 19917°F 199048%2%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Trinity 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 7:17 AM, sunset 4:46 PM
December 31
sunrise 7:36 AM, sunset 4:55 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00040738 (Big Bar 4 E), public domain. Records: NOAA GHCN-Daily, station USC00049490, 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.