With a population of around 5,700, Barnhart sits in Missouri, United States. The city operates in the Central Time Zone.
In 2025, Barnhart recorded an average annual temperature of 57°F — about 0.5°F above the 30-year normal of 57°F. The hottest day reached 95°F in August; the coldest was -0°F in February. Total precipitation was 44 inches (wetter than usual). The wettest month was April.
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