Carol Stream is a city of approximately 40,400 people in Illinois, United States. Located in the Central Time Zone at 41.9°N latitude.
In 2025, Carol Stream recorded an average annual temperature of 51°F — right at the 30-year normal of 51°F. The hottest day reached 93°F in June; the coldest was -10°F in February. Total precipitation was 35 inches (wetter than usual). The wettest month was July.
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