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Insulation in Dayton: July highs average about 84°F; January lows average about 18°F.
In Tippecanoe County, July highs average about 84°F and January lows about 18°F, with roughly 41 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, hailstorms and tornadoes in Tippecanoe County, with hail up to 4 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Tippecanoe County has had 10 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.
These are Tippecanoe County figures — more about homes in Lafayette.
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