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Monroe County, IL (shown in white) has 385.3 mi² of land area and 13.03 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 357.6' to a high of 794', with a weighted average of 512.3' above sea level.
Temperatures range from average lows around 22.8°F to average highs around 89.4°F. A year-round daily temperature averages 56.4°F. Average annual precipation is 45.6". With these temperatures and precipation, the majority of the county scores as an 6B 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 Monroe County is 35,380 with 13,921 households. These households are spread across 6 unique municipalties (not all shown).