With a population of around 13,800, Cromwell sits in Connecticut, United States. The city operates in the Eastern Time Zone.
In 2025, Cromwell recorded an average annual temperature of 51°F — right at the 30-year normal of 51°F. The hottest day reached 98°F in June; the coldest was -4°F in January. Total precipitation was 43 inches (drier than usual). The wettest month was May.
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