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Columbia County, OR (shown in white) has 658.68 mi² of land area and 30.29 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 0' to a high of 2,198.2', with a weighted average of 735.4' above sea level.
Temperatures range from average lows around 32°F to average highs around 80.2°F. A year-round daily temperature averages 51.3°F. Average annual precipation is 49.6". With these temperatures and precipation, the majority of the county scores as an 8A 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 Columbia County is 53,999 with 21,026 households. These households are spread across 9 unique municipalties (not all shown).
