Sidney is a city of approximately 1,200 people in Illinois, United States. Located in the Central Time Zone at 40°N latitude.
In 2025, Sidney recorded an average annual temperature of 54°F — about 1.2°F above the 30-year normal of 53°F. The hottest day reached 92°F in July; the coldest was -6°F in December. Total precipitation was 31 inches (drier than usual). The wettest month was April.
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