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United States › California › Trinity County › Climate Station BIG BAR 4 E, CA US Distance 8.1 mi Normals 1991–2020

30-year climate normals

Trinity County Climate and Weather Averages

Hottest month — July

96.5°

average daily high. The coldest month is December, averaging a low of 34.1°F.

Trinity County gets 35.82" of precipitation a year and 2.7" of snow, and 53% of it falls in Dec, Jan, Feb.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low PrecipSnow
January 49.6° 34.3° 6.41" 0.7"
February 55.5° 34.9° 5.37" 0.4"
March 62.3° 36.6° 4.58" 0.3"
April 68.9° 38.9° 2.62" 0.0"
May 78.4° 43.7° 1.67" 0.0"
June 86.4° 48.1° 0.73" 0.0"
July 96.5° 53.2° 0.17" 0.0"
August 95.4° 52.3° 0.20" 0.0"
September 89.0° 47.2° 0.44" 0.0"
October 74.3° 40.7° 2.20" 0.0"
November 56.8° 37.6° 4.19" 0.2"
December 47.7° 34.1° 7.24" 1.1"

Rainfall by month

Trinity County has a distinct wet season. 53% of the year's precipitation arrives in Dec, Jan, Feb.

January 6.41"
February 5.37"
March 4.58"
April 2.62"
May 1.67"
June 0.73"
July 0.17"
August 0.20"
September 0.44"
October 2.20"
November 4.19"
December 7.24"
Annual total 35.82"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 888
Heating degree days How much heating the climate demands 3,868
Approximate annual cooling cost At 33.25¢/kWh, California average $295
Approximate annual electric heating cost Lower where heating is gas rather than electric $450

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Trinity County, where electricity is one line of eight.

Common questions

What is the weather like in Trinity County?

Trinity County averages a high of 96.5°F in July and a low of 34.1°F in December. Annual precipitation is 35.82 inches, including 2.7 inches of snow.

When is the rainy season in Trinity County?

The wettest stretch is Dec, Jan, Feb, which accounts for 53% of the year's precipitation. That is a pronounced wet season rather than rain spread evenly through the year.

How hot does it get in Trinity County?

The average daily high in July, the hottest month, is 96.5°F. That drives 888 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Trinity County?

Yes. Trinity County averages 2.7 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station BIG BAR 4 E, CA US (USC00040738), 8.1 miles from the county centroid.
  • Heating and cooling degree days — NOAA, same station and period.
  • Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, California residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.