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Fairfax County, VA (shown in white) has 408 mi² of land area and 15.88 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 0' to a high of 498.7', with a weighted average of 260.1' above sea level.
Temperatures range from average lows around 25.6°F to average highs around 87.6°F. A year-round daily temperature averages 56.2°F. Average annual precipation is 47.5". With these temperatures and precipation, the majority of the county scores as an 7A 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 Fairfax County is 1,156,148 with 413,617 households. These households are spread across 69 unique municipalties (not all shown).
