Trinity Rvr Hatchery, CA Climate

Climate Insight: Trinity Rvr Hatchery, CA

In Trinity Rvr Hatchery, California, the NOAA 1991–2020 climate normals put the annual average temperature at 56°F, ranging from a mean daily high of 72°F to a mean daily low of 41°F. July is typically the warmest month of the year, while December is the coldest. As thirty-year averages computed from station USC00049026, these numbers smooth out year-to-year noise into a working baseline for a typical month.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Trinity Rvr Hatchery sees about 32.4 inches of precipitation a year, with 6.4 inches typically falling as snow. The frost-free season averages 182 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 23 and the first fall freeze near October 22. On the energy side, 4,034 heating degree days and 856 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Trinity Rvr Hatchery scores 78/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings December-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.