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Decks in Greendale: July highs average about 81°F; about 34 inches of rain fall a year.
In Milwaukee County, July highs average about 81°F and January lows about 15°F, with roughly 34 inches of rain a year. Long, cold winters put furnaces and pipes to the test.
Over the last 10 years the National Weather Service recorded hailstorms, damaging thunderstorm winds and floods in Milwaukee County, with hail up to 1.75 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Milwaukee County has had 11 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms, Tornadoes, And Flooding (2026).
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Composite costs more up front and needs almost no care; pressure-treated wood is cheaper but needs sealing.
Once a year — loose boards, soft spots and wobbly railings are safety issues.
These are Milwaukee County figures — more about homes in Milwaukee.
Greenfield · Hales Corners · Franklin · West Allis · West Milwaukee · Oak Creek · New Berlin · St. Francis