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Decks in Illiopolis: July highs average about 86°F; about 39 inches of rain fall a year.
In Sangamon County, July highs average about 86°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, hailstorms and flash floods in Sangamon County, with hail up to 3.25 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Sangamon County has had 8 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms And Flooding (2023).
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Composite costs more up front and needs almost no care; pressure-treated wood is cheaper but needs sealing.
Once a year — loose boards, soft spots and wobbly railings are safety issues.
These are Sangamon County figures — more about homes in Springfield.
Niantic · Mount Auburn · Buffalo · Mechanicsburg · Latham · Harristown · Dawson · Mount Pulaski