Downieville, CA Climate

Climate Insight: Downieville, CA

Downieville, California runs an annual average of 53°F, ranging from a mean daily high of 68°F to a mean daily low of 39°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while December is the coldest. Drawn from station USC00042500, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.

Downieville averages 64.9 inches of precipitation a year, with 26.2 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 180 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 28 and the first fall freeze near October 25. As for energy demand, 4,757 heating degree days and 455 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Downieville scores 39/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, July-driven heat at the peak of summer, and December-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.