Manteno is a city of approximately 9,000 people in Illinois, United States. Located in the Central Time Zone at 41.3°N latitude.
In 2025, Manteno recorded an average annual temperature of 51°F. The hottest temperatures reached 91°F in June; the coolest were -8°F in January. Total precipitation for the year was 39 inches, with the wettest month being July. Snowfall for the year totaled approximately 11 inches.
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