Cottage Grove, OR Climate

Climate Insight: Cottage Grove, OR

Based on station USC00351897 feeding NOAA's 1991–2020 climate normals, Cottage Grove, Oregon averages 52°F a year, ranging from a mean daily high of 64°F to a mean daily low of 41°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.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Cottage Grove sees about 46.5 inches of precipitation a year, with 2.7 inches typically falling as snow. The frost-free season averages 184 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 24 and the first fall freeze near October 25. On the energy side, 4,854 heating degree days and 225 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Cottage Grove scores 73/100 (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.