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Insulation in Marathon: July highs average about 79°F; January lows average about 14°F; the typical home was built around 1955 (76% before 1980).
In Cortland County, July highs average about 79°F and January lows about 14°F, with roughly 44 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, flash floods and hailstorms in Cortland 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 Cortland County was built around 1955, about 71 years ago, and 76% were built before 1980. Homes that age often need updated wiring, plumbing and roofs.
Cortland County has had 14 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storm, Tornadoes, And Flooding (2024).
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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 Cortland County figures — more about homes in Cortland.
Lisle · Whitney Point · McGraw · Cortland · Dryden · Homer · Greene · Freeville