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Insulation in Longtown: July highs average about 88°F; January lows average about 24°F.
In Perry County, July highs average about 88°F and January lows about 24°F, with roughly 46 inches of rain a year.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, hailstorms and floods in Perry 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.
Perry County has had 24 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms, Straight-Line Winds, Tornadoes, And Wildfires (2025).
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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.
These are Perry County figures — more about homes in Perryville.
Old Appleton · Perryville · Frohna · Altenburg · Oak Ridge · Sedgewickville · Pocahontas · St. Mary