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Decks in Unicoi: July highs average about 82°F; about 51 inches of rain fall a year.
In Unicoi County, July highs average about 82°F and January lows about 25°F, with roughly 51 inches of rain a year.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, flash floods and hailstorms in Unicoi County, with hail up to 1 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
The typical home in Unicoi County was built around 1969, about 57 years ago, and 62% were built before 1980. Homes that age often need updated wiring, plumbing and roofs.
Unicoi County has had 11 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Winter Storm (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 Unicoi County figures — more about homes in Erwin.
Erwin · Johnson City · Elizabethton · Jonesborough · Watauga · Bluff City · Tusculum · Kingsport