With a population of around 5,000, Lake Barrington sits in Illinois, United States. The city operates in the Central Time Zone.
In 2025, Lake Barrington recorded an average annual temperature of 50°F — about 1.1°F below the 30-year normal of 51°F. The hottest day reached 94°F in June; the coldest was -10°F in February. Total precipitation was 33 inches (near normal). The wettest month was June.
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