Upper Baker Dam, WA Climate

Climate Insight: Upper Baker Dam, WA

Upper Baker Dam, Washington runs an annual average of 47°F, ranging from a mean daily high of 56°F to a mean daily low of 39°F, per NOAA's 1991–2020 climate normals. August is typically the warmest month of the year, while January is the coldest. Drawn from station USC00458715, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.

Upper Baker Dam averages 98.2 inches of precipitation a year, with 42.4 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 188 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 29. As for energy demand, 6,468 heating degree days and 87 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Upper Baker Dam scores 43/100 (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, August-driven heat at the peak of summer, and January-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.