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Decks in Hermann: July highs average about 88°F; about 43 inches of rain fall a year.
In Gasconade County, July highs average about 88°F and January lows about 21°F, with roughly 43 inches of rain a year.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, hailstorms and flash floods in Gasconade County, with hail up to 2.25 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Gasconade County has had 15 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms, Straight-Line Winds, 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 Gasconade County figures — more about homes in Owensville.
McKittrick · Rhineland · Berger · Gasconade · Morrison · High Hill · Jonesburg · New Haven