About Belleville, IL

Belleville is a city of approximately 42,000 people in Illinois, United States. Located in the Central Time Zone at 38.5°N latitude.

Across a typical year Belleville sees about 43 inches of precipitation and 11 inches of snow, with May the wettest month and February the driest. Temperatures range from January lows near 24°F up to July highs around 90°F, averaging 58°F annually — characteristic of a humid continental climate.