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Peoria County, IL (shown in white) has 618.7 mi² of land area and 11.55 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 429.8' to a high of 810.4', with a weighted average of 646.3' above sea level.
Temperatures range from average lows around 16.8°F to average highs around 86.6°F. A year-round daily temperature averages 52.7°F. Average annual precipation is 41.6". With these temperatures and precipation, the majority of the county scores as an 5B 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 Peoria County is 178,499 with 74,396 households. These households are spread across 20 unique municipalties (not all shown).
