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Insulation in Watertown: July highs average about 84°F; January lows average about 17°F; the typical home was built around 1958 (71% before 1980).
In Middlesex County, July highs average about 84°F and January lows about 17°F, with roughly 47 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 flash floods in Middlesex County, with hail up to 1 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
The typical home in Middlesex County was built around 1958, about 68 years ago, and 71% were built before 1980. Homes that age often need updated wiring, plumbing and roofs.
Middlesex County has had 24 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Hurricane Lee (2023).
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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 Middlesex County figures — more about homes in Cambridge.
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