Yreka, CA Climate

Climate Insight: Yreka, CA

Based on station USC00049866 feeding NOAA's 1991–2020 climate normals, Yreka, California averages 54°F a year, ranging from a mean daily high of 68°F to a mean daily low of 39°F. July is typically the warmest month of the year, while December is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.

Beyond temperature, Yreka averages 18.9 inches of precipitation annually, with 11.6 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 171 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 30 and the first fall freeze near October 18. Turning to energy use, 4,951 heating degree days and 787 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Yreka scores 54/100 (Moderate), 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.