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Washington County, OH (shown in white) has 631.97 mi² of land area and 8.03 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 600.4' to a high of 1,135.2', with a weighted average of 820.2' above sea level.
Temperatures range from average lows around 21.7°F to average highs around 85.8°F. A year-round daily temperature averages 54.1°F. Average annual precipation is 46.2". 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 Washington County is 59,300 with 25,035 households. These households are spread across 13 unique municipalties (not all shown).
