Healdsburg, CA Climate

Climate Insight: Healdsburg, CA

Based on station USC00043875 feeding NOAA's 1991–2020 climate normals, Healdsburg, California averages 60°F a year, ranging from a mean daily high of 74°F to a mean daily low of 47°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.

Healdsburg averages 42.8 inches of precipitation a year, with negligible snowfall, and that matters as much to daily life here as temperature does. The frost-free season averages 290 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near February 15 and the first fall freeze near December 2. As for energy demand, 2,524 heating degree days and 781 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Healdsburg scores 97/100 (Excellent), 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.