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Lewis County, MO (shown in white) has 505.02 mi² of land area and 5.78 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 433.1' to a high of 757.9', with a weighted average of 629.6' above sea level.
Temperatures range from average lows around 17.4°F to average highs around 86.4°F. A year-round daily temperature averages 52.6°F. Average annual precipation is 41.3". 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 Lewis County is 10,195 with 3,862 households. These households are spread across 7 unique municipalties (not all shown).