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Insulation in Montezuma: July highs average about 84°F; January lows average about 19°F.
In Mercer County, July highs average about 84°F and January lows about 19°F, with roughly 39 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 hailstorms in Mercer County, with hail up to 2.5 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Mercer County has had 9 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Tornadoes (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 Mercer County figures — more about homes in Celina.
Coldwater · Celina · Chickasaw · St. Henry · St. Marys · New Bremen · Burkettsville · Osgood