Warren, in Illinois, United States, is home to roughly 1,400 people in the Central Time Zone at 42.5°N latitude.
In 2025, Warren recorded an average annual temperature of 49°F. The hottest temperatures reached 91°F in June; the coolest were -13°F in January. Total precipitation for the year was 33 inches, with the wettest month being August. Snowfall for the year totaled approximately 10 inches.
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