Assumption is a city of approximately 1,100 people in Illinois, United States. Located in the Central Time Zone at 39.5°N latitude.
Expect a humid continental climate in Assumption: average highs of 86°F in midsummer, lows near 20°F in midwinter, and an annual mean of 53°F. Precipitation totals roughly 36 inches per year, concentrated around May, with February typically the driest month.
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