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Insulation in Lewiston: July highs average about 81°F; January lows average about 8°F.
In Winona County, July highs average about 81°F and January lows about 8°F, with roughly 37 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 hailstorms, damaging thunderstorm winds and floods in Winona County, with hail up to 3 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Winona County has had 6 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Covid-19 Pandemic (2020).
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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 Winona County figures — more about homes in Winona.
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