Sumner is a city of approximately 3,200 people in Illinois, United States. Located in the Central Time Zone at 38.7°N latitude.
Expect a humid continental climate in Sumner: average highs of 88°F in midsummer, lows near 23°F in midwinter, and an annual mean of 56°F. Precipitation totals roughly 42 inches per year, concentrated around May, with February typically the driest month.
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