Solar in Mercer, MO: we connect you with top-rated local solar installers, checked by our team — their proposals come straight to your Homeshi account. Free for property owners.
Solar in Mercer: July highs average about 86°F.
In Mercer County, July highs average about 86°F and January lows about 16°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, hailstorms and flash floods in Mercer County, with hail up to 2.75 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Mercer County has had 15 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms, Straight-Line Winds, Tornadoes, And Flooding (2026).
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It depends on your roof, shade and power bill — ask for a proposal with the expected savings and payback in years.
If the roof has under 10 years left, replace it before the panels go on.
These are Mercer County figures — more about homes in Princeton.
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