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Insulation in Annapolis: July highs average about 88°F; January lows average about 27°F; the typical home was built around 1983 (47% before 1980).
In Anne Arundel County, July highs average about 88°F and January lows about 27°F, with roughly 46 inches of rain a year.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, floods and hailstorms in Anne Arundel 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.
The typical home in Anne Arundel County was built around 1983, about 43 years ago, and 47% were built before 1980. Homes that age often need updated wiring, plumbing and roofs.
Anne Arundel County has had 13 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.
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