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Carroll County, IL (shown in white) has 445.41 mi² of land area and 21.58 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 584' to a high of 1,072.8', with a weighted average of 768.1' above sea level.
Temperatures range from average lows around 11.6°F to average highs around 85.4°F. A year-round daily temperature averages 49°F. Average annual precipation is 41.5". With these temperatures and precipation, the majority of the county scores as an 5A using the USDA Plant Hardiness Zone Map (the standard by which gardeners and growers can determine which perennial plants are most likely to thrive in a location).
The estimated population of Carroll County is 15,737 with 6,527 households. These households are spread across 8 unique municipalties (not all shown).
