Union is a city of approximately 11,000 people in Missouri, United States. Located in the Central Time Zone at 38.5°N latitude.
In 2025, Union recorded an average annual temperature of 57°F. The hottest temperatures reached 97°F in August; the coolest were -2°F in February. Total precipitation for the year was 42 inches, with the wettest month being April. Snowfall for the year totaled approximately 6 inches.
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