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Decks in Denison: July highs average about 89°F; about 36 inches of rain fall a year.
In Jackson County, July highs average about 89°F and January lows about 17°F, with roughly 36 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 damaging thunderstorm winds, hailstorms and tornadoes in Jackson County, with hail up to 2.5 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Jackson County has had 13 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 Jackson County figures — more about homes in Holton.
Mayetta · Holton · Valley Falls · Hoyt · Muscotah · Whiting · Ozawkie · Meriden