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Clark County, IL (shown in white) has 501.37 mi² of land area and 3.39 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 426.5' to a high of 774.3', with a weighted average of 583.7' above sea level.
Temperatures range from average lows around 18.5°F to average highs around 87.9°F. A year-round daily temperature averages 54.2°F. Average annual precipation is 47.5". With these temperatures and precipation, the majority of the county scores as an 6A 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 Clark County is 15,164 with 6,383 households. These households are spread across 5 unique municipalties (not all shown).
