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Insulation in Westby: July highs average about 81°F; January lows average about 8°F.
In Vernon County, July highs average about 81°F and January lows about 8°F, with roughly 38 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, floods and hailstorms in Vernon County, with hail up to 2.75 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Vernon County has had 12 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms, Tornadoes, And Flooding (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.
These are Vernon County figures — more about homes in Viroqua.
Viroqua · Cashton · Coon Valley · Melvina · Chaseburg · La Farge · Viola · Ontario