South Milwaukee Wwtp, WI Climate

Climate Insight: South Milwaukee Wwtp, WI

In South Milwaukee Wwtp, Wisconsin, the NOAA 1991–2020 climate normals put the annual average temperature at 48°F, ranging from a mean daily high of 56°F to a mean daily low of 41°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00477964, these numbers smooth out year-to-year noise into a working baseline for a typical month.

Anyone planning to live, garden, or travel in South Milwaukee Wwtp should weigh precipitation alongside temperature: the annual average runs 36.6 inches, predominantly as rainfall. The frost-free season averages 187 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 22 and the first fall freeze near October 26. And on the energy front, 6,679 heating degree days and 661 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, South Milwaukee Wwtp scores 68/100 (Good), 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 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.