With a population of around 9,400, Thompson sits in Connecticut, United States. The city operates in the Eastern Time Zone.
In 2025, Thompson recorded an average annual temperature of 50°F — about 1.4°F above the 30-year normal of 48°F. The hottest day reached 95°F in June; the coldest was -3°F in January. Total precipitation was 42 inches (drier than usual). Snowfall totaled 9 inches, below the 73-inch average. The wettest month was May.
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