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Insulation in Selmer: July highs average about 90°F; January lows average about 30°F; the typical home was built around 1978 (53% before 1980).
In McNairy County, July highs average about 90°F and January lows about 30°F, with roughly 57 inches of rain a year.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, hailstorms and flash floods in McNairy County, with hail up to 1.25 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
The typical home in McNairy County was built around 1978, about 48 years ago, and 53% were built before 1980. Homes that age often need updated wiring, plumbing and roofs.
McNairy County has had 17 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Winter Storm (2026).
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Uneven rooms, high bills and an attic you can see the joists in are the signs; older homes often have far too little.
Attic insulation and air-sealing usually pay back fastest.
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