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Insulation in Marshville: July highs average about 91°F; January lows average about 31°F.
In Union County, July highs average about 91°F and January lows about 31°F, with roughly 44 inches of rain a year.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, hailstorms and flash floods in Union 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.
Union County has had 14 federal disaster declarations in the last 25 years, most often for hurricanes; 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 Union County figures — more about homes in Indian Trail.
Wingate · Peachland · Polkton · Unionville · Monroe · Fairview · Lake Park · Wadesboro