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Ionia County, MI (shown in white) has 571.32 mi² of land area and 8.72 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 613.5' to a high of 951.4', with a weighted average of 799.6' above sea level.
Temperatures range from average lows around 13.4°F to average highs around 84.1°F. A year-round daily temperature averages 47.6°F. Average annual precipation is 39.8". 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 Ionia County is 67,693 with 23,477 households. These households are spread across 11 unique municipalties (not all shown).
